1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /**************************************************************************/ 3 /* */ 4 /* IBM System i and System p Virtual NIC Device Driver */ 5 /* Copyright (C) 2014 IBM Corp. */ 6 /* Santiago Leon (santi_leon@yahoo.com) */ 7 /* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */ 8 /* John Allen (jallen@linux.vnet.ibm.com) */ 9 /* */ 10 /* */ 11 /* This module contains the implementation of a virtual ethernet device */ 12 /* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */ 13 /* option of the RS/6000 Platform Architecture to interface with virtual */ 14 /* ethernet NICs that are presented to the partition by the hypervisor. */ 15 /* */ 16 /* Messages are passed between the VNIC driver and the VNIC server using */ 17 /* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */ 18 /* issue and receive commands that initiate communication with the server */ 19 /* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */ 20 /* are used by the driver to notify the server that a packet is */ 21 /* ready for transmission or that a buffer has been added to receive a */ 22 /* packet. Subsequently, sCRQs are used by the server to notify the */ 23 /* driver that a packet transmission has been completed or that a packet */ 24 /* has been received and placed in a waiting buffer. */ 25 /* */ 26 /* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */ 27 /* which skbs are DMA mapped and immediately unmapped when the transmit */ 28 /* or receive has been completed, the VNIC driver is required to use */ 29 /* "long term mapping". This entails that large, continuous DMA mapped */ 30 /* buffers are allocated on driver initialization and these buffers are */ 31 /* then continuously reused to pass skbs to and from the VNIC server. */ 32 /* */ 33 /**************************************************************************/ 34 35 #include <linux/module.h> 36 #include <linux/moduleparam.h> 37 #include <linux/types.h> 38 #include <linux/errno.h> 39 #include <linux/completion.h> 40 #include <linux/ioport.h> 41 #include <linux/dma-mapping.h> 42 #include <linux/kernel.h> 43 #include <linux/netdevice.h> 44 #include <linux/etherdevice.h> 45 #include <linux/skbuff.h> 46 #include <linux/init.h> 47 #include <linux/delay.h> 48 #include <linux/mm.h> 49 #include <linux/ethtool.h> 50 #include <linux/proc_fs.h> 51 #include <linux/if_arp.h> 52 #include <linux/in.h> 53 #include <linux/ip.h> 54 #include <linux/ipv6.h> 55 #include <linux/irq.h> 56 #include <linux/irqdomain.h> 57 #include <linux/kthread.h> 58 #include <linux/seq_file.h> 59 #include <linux/interrupt.h> 60 #include <net/net_namespace.h> 61 #include <asm/hvcall.h> 62 #include <linux/atomic.h> 63 #include <asm/vio.h> 64 #include <asm/xive.h> 65 #include <asm/iommu.h> 66 #include <linux/uaccess.h> 67 #include <asm/firmware.h> 68 #include <linux/workqueue.h> 69 #include <linux/if_vlan.h> 70 #include <linux/utsname.h> 71 #include <linux/cpu.h> 72 73 #include "ibmvnic.h" 74 75 static const char ibmvnic_driver_name[] = "ibmvnic"; 76 static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver"; 77 78 MODULE_AUTHOR("Santiago Leon"); 79 MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver"); 80 MODULE_LICENSE("GPL"); 81 MODULE_VERSION(IBMVNIC_DRIVER_VERSION); 82 83 static int ibmvnic_version = IBMVNIC_INITIAL_VERSION; 84 static void release_sub_crqs(struct ibmvnic_adapter *, bool); 85 static int ibmvnic_reset_crq(struct ibmvnic_adapter *); 86 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *); 87 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *); 88 static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *); 89 static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64); 90 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance); 91 static int enable_scrq_irq(struct ibmvnic_adapter *, 92 struct ibmvnic_sub_crq_queue *); 93 static int disable_scrq_irq(struct ibmvnic_adapter *, 94 struct ibmvnic_sub_crq_queue *); 95 static int pending_scrq(struct ibmvnic_adapter *, 96 struct ibmvnic_sub_crq_queue *); 97 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *, 98 struct ibmvnic_sub_crq_queue *); 99 static int ibmvnic_poll(struct napi_struct *napi, int data); 100 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter); 101 static inline void reinit_init_done(struct ibmvnic_adapter *adapter); 102 static void send_query_map(struct ibmvnic_adapter *adapter); 103 static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, u32, u8); 104 static int send_request_unmap(struct ibmvnic_adapter *, u8); 105 static int send_login(struct ibmvnic_adapter *adapter); 106 static void send_query_cap(struct ibmvnic_adapter *adapter); 107 static int init_sub_crqs(struct ibmvnic_adapter *); 108 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter); 109 static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset); 110 static void release_crq_queue(struct ibmvnic_adapter *); 111 static int __ibmvnic_set_mac(struct net_device *, u8 *); 112 static int init_crq_queue(struct ibmvnic_adapter *adapter); 113 static int send_query_phys_parms(struct ibmvnic_adapter *adapter); 114 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 115 struct ibmvnic_sub_crq_queue *tx_scrq); 116 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 117 struct ibmvnic_long_term_buff *ltb); 118 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter); 119 static void flush_reset_queue(struct ibmvnic_adapter *adapter); 120 static void print_subcrq_error(struct device *dev, int rc, const char *func); 121 122 struct ibmvnic_stat { 123 char name[ETH_GSTRING_LEN]; 124 int offset; 125 }; 126 127 #define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \ 128 offsetof(struct ibmvnic_statistics, stat)) 129 #define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off)))) 130 131 static const struct ibmvnic_stat ibmvnic_stats[] = { 132 {"rx_packets", IBMVNIC_STAT_OFF(rx_packets)}, 133 {"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)}, 134 {"tx_packets", IBMVNIC_STAT_OFF(tx_packets)}, 135 {"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)}, 136 {"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)}, 137 {"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)}, 138 {"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)}, 139 {"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)}, 140 {"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)}, 141 {"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)}, 142 {"align_errors", IBMVNIC_STAT_OFF(align_errors)}, 143 {"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)}, 144 {"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)}, 145 {"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)}, 146 {"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)}, 147 {"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)}, 148 {"late_collisions", IBMVNIC_STAT_OFF(late_collisions)}, 149 {"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)}, 150 {"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)}, 151 {"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)}, 152 {"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)}, 153 {"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)}, 154 }; 155 156 static int send_crq_init_complete(struct ibmvnic_adapter *adapter) 157 { 158 union ibmvnic_crq crq; 159 160 memset(&crq, 0, sizeof(crq)); 161 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 162 crq.generic.cmd = IBMVNIC_CRQ_INIT_COMPLETE; 163 164 return ibmvnic_send_crq(adapter, &crq); 165 } 166 167 static int send_version_xchg(struct ibmvnic_adapter *adapter) 168 { 169 union ibmvnic_crq crq; 170 171 memset(&crq, 0, sizeof(crq)); 172 crq.version_exchange.first = IBMVNIC_CRQ_CMD; 173 crq.version_exchange.cmd = VERSION_EXCHANGE; 174 crq.version_exchange.version = cpu_to_be16(ibmvnic_version); 175 176 return ibmvnic_send_crq(adapter, &crq); 177 } 178 179 static void ibmvnic_clean_queue_affinity(struct ibmvnic_adapter *adapter, 180 struct ibmvnic_sub_crq_queue *queue) 181 { 182 if (!(queue && queue->irq)) 183 return; 184 185 cpumask_clear(queue->affinity_mask); 186 187 if (irq_set_affinity_and_hint(queue->irq, NULL)) 188 netdev_warn(adapter->netdev, 189 "%s: Clear affinity failed, queue addr = %p, IRQ = %d\n", 190 __func__, queue, queue->irq); 191 } 192 193 static void ibmvnic_clean_affinity(struct ibmvnic_adapter *adapter) 194 { 195 struct ibmvnic_sub_crq_queue **rxqs; 196 struct ibmvnic_sub_crq_queue **txqs; 197 int num_rxqs, num_txqs; 198 int i; 199 200 rxqs = adapter->rx_scrq; 201 txqs = adapter->tx_scrq; 202 num_txqs = adapter->num_active_tx_scrqs; 203 num_rxqs = adapter->num_active_rx_scrqs; 204 205 netdev_dbg(adapter->netdev, "%s: Cleaning irq affinity hints", __func__); 206 if (txqs) { 207 for (i = 0; i < num_txqs; i++) 208 ibmvnic_clean_queue_affinity(adapter, txqs[i]); 209 } 210 if (rxqs) { 211 for (i = 0; i < num_rxqs; i++) 212 ibmvnic_clean_queue_affinity(adapter, rxqs[i]); 213 } 214 } 215 216 static int ibmvnic_set_queue_affinity(struct ibmvnic_sub_crq_queue *queue, 217 unsigned int *cpu, int *stragglers, 218 int stride) 219 { 220 cpumask_var_t mask; 221 int i; 222 int rc = 0; 223 224 if (!(queue && queue->irq)) 225 return rc; 226 227 /* cpumask_var_t is either a pointer or array, allocation works here */ 228 if (!zalloc_cpumask_var(&mask, GFP_KERNEL)) 229 return -ENOMEM; 230 231 /* while we have extra cpu give one extra to this irq */ 232 if (*stragglers) { 233 stride++; 234 (*stragglers)--; 235 } 236 /* atomic write is safer than writing bit by bit directly */ 237 for (i = 0; i < stride; i++) { 238 cpumask_set_cpu(*cpu, mask); 239 *cpu = cpumask_next_wrap(*cpu, cpu_online_mask, 240 nr_cpu_ids, false); 241 } 242 /* set queue affinity mask */ 243 cpumask_copy(queue->affinity_mask, mask); 244 rc = irq_set_affinity_and_hint(queue->irq, queue->affinity_mask); 245 free_cpumask_var(mask); 246 247 return rc; 248 } 249 250 /* assumes cpu read lock is held */ 251 static void ibmvnic_set_affinity(struct ibmvnic_adapter *adapter) 252 { 253 struct ibmvnic_sub_crq_queue **rxqs = adapter->rx_scrq; 254 struct ibmvnic_sub_crq_queue **txqs = adapter->tx_scrq; 255 struct ibmvnic_sub_crq_queue *queue; 256 int num_rxqs = adapter->num_active_rx_scrqs, i_rxqs = 0; 257 int num_txqs = adapter->num_active_tx_scrqs, i_txqs = 0; 258 int total_queues, stride, stragglers, i; 259 unsigned int num_cpu, cpu; 260 bool is_rx_queue; 261 int rc = 0; 262 263 netdev_dbg(adapter->netdev, "%s: Setting irq affinity hints", __func__); 264 if (!(adapter->rx_scrq && adapter->tx_scrq)) { 265 netdev_warn(adapter->netdev, 266 "%s: Set affinity failed, queues not allocated\n", 267 __func__); 268 return; 269 } 270 271 total_queues = num_rxqs + num_txqs; 272 num_cpu = num_online_cpus(); 273 /* number of cpu's assigned per irq */ 274 stride = max_t(int, num_cpu / total_queues, 1); 275 /* number of leftover cpu's */ 276 stragglers = num_cpu >= total_queues ? num_cpu % total_queues : 0; 277 /* next available cpu to assign irq to */ 278 cpu = cpumask_next(-1, cpu_online_mask); 279 280 for (i = 0; i < total_queues; i++) { 281 is_rx_queue = false; 282 /* balance core load by alternating rx and tx assignments 283 * ex: TX0 -> RX0 -> TX1 -> RX1 etc. 284 */ 285 if ((i % 2 == 1 && i_rxqs < num_rxqs) || i_txqs == num_txqs) { 286 queue = rxqs[i_rxqs++]; 287 is_rx_queue = true; 288 } else { 289 queue = txqs[i_txqs++]; 290 } 291 292 rc = ibmvnic_set_queue_affinity(queue, &cpu, &stragglers, 293 stride); 294 if (rc) 295 goto out; 296 297 if (!queue || is_rx_queue) 298 continue; 299 300 rc = __netif_set_xps_queue(adapter->netdev, 301 cpumask_bits(queue->affinity_mask), 302 i_txqs - 1, XPS_CPUS); 303 if (rc) 304 netdev_warn(adapter->netdev, "%s: Set XPS on queue %d failed, rc = %d.\n", 305 __func__, i_txqs - 1, rc); 306 } 307 308 out: 309 if (rc) { 310 netdev_warn(adapter->netdev, 311 "%s: Set affinity failed, queue addr = %p, IRQ = %d, rc = %d.\n", 312 __func__, queue, queue->irq, rc); 313 ibmvnic_clean_affinity(adapter); 314 } 315 } 316 317 static int ibmvnic_cpu_online(unsigned int cpu, struct hlist_node *node) 318 { 319 struct ibmvnic_adapter *adapter; 320 321 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node); 322 ibmvnic_set_affinity(adapter); 323 return 0; 324 } 325 326 static int ibmvnic_cpu_dead(unsigned int cpu, struct hlist_node *node) 327 { 328 struct ibmvnic_adapter *adapter; 329 330 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node_dead); 331 ibmvnic_set_affinity(adapter); 332 return 0; 333 } 334 335 static int ibmvnic_cpu_down_prep(unsigned int cpu, struct hlist_node *node) 336 { 337 struct ibmvnic_adapter *adapter; 338 339 adapter = hlist_entry_safe(node, struct ibmvnic_adapter, node); 340 ibmvnic_clean_affinity(adapter); 341 return 0; 342 } 343 344 static enum cpuhp_state ibmvnic_online; 345 346 static int ibmvnic_cpu_notif_add(struct ibmvnic_adapter *adapter) 347 { 348 int ret; 349 350 ret = cpuhp_state_add_instance_nocalls(ibmvnic_online, &adapter->node); 351 if (ret) 352 return ret; 353 ret = cpuhp_state_add_instance_nocalls(CPUHP_IBMVNIC_DEAD, 354 &adapter->node_dead); 355 if (!ret) 356 return ret; 357 cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node); 358 return ret; 359 } 360 361 static void ibmvnic_cpu_notif_remove(struct ibmvnic_adapter *adapter) 362 { 363 cpuhp_state_remove_instance_nocalls(ibmvnic_online, &adapter->node); 364 cpuhp_state_remove_instance_nocalls(CPUHP_IBMVNIC_DEAD, 365 &adapter->node_dead); 366 } 367 368 static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, 369 unsigned long length, unsigned long *number, 370 unsigned long *irq) 371 { 372 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 373 long rc; 374 375 rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length); 376 *number = retbuf[0]; 377 *irq = retbuf[1]; 378 379 return rc; 380 } 381 382 /** 383 * ibmvnic_wait_for_completion - Check device state and wait for completion 384 * @adapter: private device data 385 * @comp_done: completion structure to wait for 386 * @timeout: time to wait in milliseconds 387 * 388 * Wait for a completion signal or until the timeout limit is reached 389 * while checking that the device is still active. 390 */ 391 static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter, 392 struct completion *comp_done, 393 unsigned long timeout) 394 { 395 struct net_device *netdev; 396 unsigned long div_timeout; 397 u8 retry; 398 399 netdev = adapter->netdev; 400 retry = 5; 401 div_timeout = msecs_to_jiffies(timeout / retry); 402 while (true) { 403 if (!adapter->crq.active) { 404 netdev_err(netdev, "Device down!\n"); 405 return -ENODEV; 406 } 407 if (!retry--) 408 break; 409 if (wait_for_completion_timeout(comp_done, div_timeout)) 410 return 0; 411 } 412 netdev_err(netdev, "Operation timed out.\n"); 413 return -ETIMEDOUT; 414 } 415 416 /** 417 * reuse_ltb() - Check if a long term buffer can be reused 418 * @ltb: The long term buffer to be checked 419 * @size: The size of the long term buffer. 420 * 421 * An LTB can be reused unless its size has changed. 422 * 423 * Return: Return true if the LTB can be reused, false otherwise. 424 */ 425 static bool reuse_ltb(struct ibmvnic_long_term_buff *ltb, int size) 426 { 427 return (ltb->buff && ltb->size == size); 428 } 429 430 /** 431 * alloc_long_term_buff() - Allocate a long term buffer (LTB) 432 * 433 * @adapter: ibmvnic adapter associated to the LTB 434 * @ltb: container object for the LTB 435 * @size: size of the LTB 436 * 437 * Allocate an LTB of the specified size and notify VIOS. 438 * 439 * If the given @ltb already has the correct size, reuse it. Otherwise if 440 * its non-NULL, free it. Then allocate a new one of the correct size. 441 * Notify the VIOS either way since we may now be working with a new VIOS. 442 * 443 * Allocating larger chunks of memory during resets, specially LPM or under 444 * low memory situations can cause resets to fail/timeout and for LPAR to 445 * lose connectivity. So hold onto the LTB even if we fail to communicate 446 * with the VIOS and reuse it on next open. Free LTB when adapter is closed. 447 * 448 * Return: 0 if we were able to allocate the LTB and notify the VIOS and 449 * a negative value otherwise. 450 */ 451 static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, 452 struct ibmvnic_long_term_buff *ltb, int size) 453 { 454 struct device *dev = &adapter->vdev->dev; 455 u64 prev = 0; 456 int rc; 457 458 if (!reuse_ltb(ltb, size)) { 459 dev_dbg(dev, 460 "LTB size changed from 0x%llx to 0x%x, reallocating\n", 461 ltb->size, size); 462 prev = ltb->size; 463 free_long_term_buff(adapter, ltb); 464 } 465 466 if (ltb->buff) { 467 dev_dbg(dev, "Reusing LTB [map %d, size 0x%llx]\n", 468 ltb->map_id, ltb->size); 469 } else { 470 ltb->buff = dma_alloc_coherent(dev, size, <b->addr, 471 GFP_KERNEL); 472 if (!ltb->buff) { 473 dev_err(dev, "Couldn't alloc long term buffer\n"); 474 return -ENOMEM; 475 } 476 ltb->size = size; 477 478 ltb->map_id = find_first_zero_bit(adapter->map_ids, 479 MAX_MAP_ID); 480 bitmap_set(adapter->map_ids, ltb->map_id, 1); 481 482 dev_dbg(dev, 483 "Allocated new LTB [map %d, size 0x%llx was 0x%llx]\n", 484 ltb->map_id, ltb->size, prev); 485 } 486 487 /* Ensure ltb is zeroed - specially when reusing it. */ 488 memset(ltb->buff, 0, ltb->size); 489 490 mutex_lock(&adapter->fw_lock); 491 adapter->fw_done_rc = 0; 492 reinit_completion(&adapter->fw_done); 493 494 rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); 495 if (rc) { 496 dev_err(dev, "send_request_map failed, rc = %d\n", rc); 497 goto out; 498 } 499 500 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 501 if (rc) { 502 dev_err(dev, "LTB map request aborted or timed out, rc = %d\n", 503 rc); 504 goto out; 505 } 506 507 if (adapter->fw_done_rc) { 508 dev_err(dev, "Couldn't map LTB, rc = %d\n", 509 adapter->fw_done_rc); 510 rc = -EIO; 511 goto out; 512 } 513 rc = 0; 514 out: 515 /* don't free LTB on communication error - see function header */ 516 mutex_unlock(&adapter->fw_lock); 517 return rc; 518 } 519 520 static void free_long_term_buff(struct ibmvnic_adapter *adapter, 521 struct ibmvnic_long_term_buff *ltb) 522 { 523 struct device *dev = &adapter->vdev->dev; 524 525 if (!ltb->buff) 526 return; 527 528 /* VIOS automatically unmaps the long term buffer at remote 529 * end for the following resets: 530 * FAILOVER, MOBILITY, TIMEOUT. 531 */ 532 if (adapter->reset_reason != VNIC_RESET_FAILOVER && 533 adapter->reset_reason != VNIC_RESET_MOBILITY && 534 adapter->reset_reason != VNIC_RESET_TIMEOUT) 535 send_request_unmap(adapter, ltb->map_id); 536 537 dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr); 538 539 ltb->buff = NULL; 540 /* mark this map_id free */ 541 bitmap_clear(adapter->map_ids, ltb->map_id, 1); 542 ltb->map_id = 0; 543 } 544 545 /** 546 * free_ltb_set - free the given set of long term buffers (LTBS) 547 * @adapter: The ibmvnic adapter containing this ltb set 548 * @ltb_set: The ltb_set to be freed 549 * 550 * Free the set of LTBs in the given set. 551 */ 552 553 static void free_ltb_set(struct ibmvnic_adapter *adapter, 554 struct ibmvnic_ltb_set *ltb_set) 555 { 556 int i; 557 558 for (i = 0; i < ltb_set->num_ltbs; i++) 559 free_long_term_buff(adapter, <b_set->ltbs[i]); 560 561 kfree(ltb_set->ltbs); 562 ltb_set->ltbs = NULL; 563 ltb_set->num_ltbs = 0; 564 } 565 566 /** 567 * alloc_ltb_set() - Allocate a set of long term buffers (LTBs) 568 * 569 * @adapter: ibmvnic adapter associated to the LTB 570 * @ltb_set: container object for the set of LTBs 571 * @num_buffs: Number of buffers in the LTB 572 * @buff_size: Size of each buffer in the LTB 573 * 574 * Allocate a set of LTBs to accommodate @num_buffs buffers of @buff_size 575 * each. We currently cap size each LTB to IBMVNIC_ONE_LTB_SIZE. If the 576 * new set of LTBs have fewer LTBs than the old set, free the excess LTBs. 577 * If new set needs more than in old set, allocate the remaining ones. 578 * Try and reuse as many LTBs as possible and avoid reallocation. 579 * 580 * Any changes to this allocation strategy must be reflected in 581 * map_rxpool_buff_to_ltb() and map_txpool_buff_to_ltb(). 582 */ 583 static int alloc_ltb_set(struct ibmvnic_adapter *adapter, 584 struct ibmvnic_ltb_set *ltb_set, int num_buffs, 585 int buff_size) 586 { 587 struct device *dev = &adapter->vdev->dev; 588 struct ibmvnic_ltb_set old_set; 589 struct ibmvnic_ltb_set new_set; 590 int rem_size; 591 int tot_size; /* size of all ltbs */ 592 int ltb_size; /* size of one ltb */ 593 int nltbs; 594 int rc; 595 int n; 596 int i; 597 598 dev_dbg(dev, "%s() num_buffs %d, buff_size %d\n", __func__, num_buffs, 599 buff_size); 600 601 ltb_size = rounddown(IBMVNIC_ONE_LTB_SIZE, buff_size); 602 tot_size = num_buffs * buff_size; 603 604 if (ltb_size > tot_size) 605 ltb_size = tot_size; 606 607 nltbs = tot_size / ltb_size; 608 if (tot_size % ltb_size) 609 nltbs++; 610 611 old_set = *ltb_set; 612 613 if (old_set.num_ltbs == nltbs) { 614 new_set = old_set; 615 } else { 616 int tmp = nltbs * sizeof(struct ibmvnic_long_term_buff); 617 618 new_set.ltbs = kzalloc(tmp, GFP_KERNEL); 619 if (!new_set.ltbs) 620 return -ENOMEM; 621 622 new_set.num_ltbs = nltbs; 623 624 /* Free any excess ltbs in old set */ 625 for (i = new_set.num_ltbs; i < old_set.num_ltbs; i++) 626 free_long_term_buff(adapter, &old_set.ltbs[i]); 627 628 /* Copy remaining ltbs to new set. All LTBs except the 629 * last one are of the same size. alloc_long_term_buff() 630 * will realloc if the size changes. 631 */ 632 n = min(old_set.num_ltbs, new_set.num_ltbs); 633 for (i = 0; i < n; i++) 634 new_set.ltbs[i] = old_set.ltbs[i]; 635 636 /* Any additional ltbs in new set will have NULL ltbs for 637 * now and will be allocated in alloc_long_term_buff(). 638 */ 639 640 /* We no longer need the old_set so free it. Note that we 641 * may have reused some ltbs from old set and freed excess 642 * ltbs above. So we only need to free the container now 643 * not the LTBs themselves. (i.e. dont free_ltb_set()!) 644 */ 645 kfree(old_set.ltbs); 646 old_set.ltbs = NULL; 647 old_set.num_ltbs = 0; 648 649 /* Install the new set. If allocations fail below, we will 650 * retry later and know what size LTBs we need. 651 */ 652 *ltb_set = new_set; 653 } 654 655 i = 0; 656 rem_size = tot_size; 657 while (rem_size) { 658 if (ltb_size > rem_size) 659 ltb_size = rem_size; 660 661 rem_size -= ltb_size; 662 663 rc = alloc_long_term_buff(adapter, &new_set.ltbs[i], ltb_size); 664 if (rc) 665 goto out; 666 i++; 667 } 668 669 WARN_ON(i != new_set.num_ltbs); 670 671 return 0; 672 out: 673 /* We may have allocated one/more LTBs before failing and we 674 * want to try and reuse on next reset. So don't free ltb set. 675 */ 676 return rc; 677 } 678 679 /** 680 * map_rxpool_buf_to_ltb - Map given rxpool buffer to offset in an LTB. 681 * @rxpool: The receive buffer pool containing buffer 682 * @bufidx: Index of buffer in rxpool 683 * @ltbp: (Output) pointer to the long term buffer containing the buffer 684 * @offset: (Output) offset of buffer in the LTB from @ltbp 685 * 686 * Map the given buffer identified by [rxpool, bufidx] to an LTB in the 687 * pool and its corresponding offset. Assume for now that each LTB is of 688 * different size but could possibly be optimized based on the allocation 689 * strategy in alloc_ltb_set(). 690 */ 691 static void map_rxpool_buf_to_ltb(struct ibmvnic_rx_pool *rxpool, 692 unsigned int bufidx, 693 struct ibmvnic_long_term_buff **ltbp, 694 unsigned int *offset) 695 { 696 struct ibmvnic_long_term_buff *ltb; 697 int nbufs; /* # of buffers in one ltb */ 698 int i; 699 700 WARN_ON(bufidx >= rxpool->size); 701 702 for (i = 0; i < rxpool->ltb_set.num_ltbs; i++) { 703 ltb = &rxpool->ltb_set.ltbs[i]; 704 nbufs = ltb->size / rxpool->buff_size; 705 if (bufidx < nbufs) 706 break; 707 bufidx -= nbufs; 708 } 709 710 *ltbp = ltb; 711 *offset = bufidx * rxpool->buff_size; 712 } 713 714 /** 715 * map_txpool_buf_to_ltb - Map given txpool buffer to offset in an LTB. 716 * @txpool: The transmit buffer pool containing buffer 717 * @bufidx: Index of buffer in txpool 718 * @ltbp: (Output) pointer to the long term buffer (LTB) containing the buffer 719 * @offset: (Output) offset of buffer in the LTB from @ltbp 720 * 721 * Map the given buffer identified by [txpool, bufidx] to an LTB in the 722 * pool and its corresponding offset. 723 */ 724 static void map_txpool_buf_to_ltb(struct ibmvnic_tx_pool *txpool, 725 unsigned int bufidx, 726 struct ibmvnic_long_term_buff **ltbp, 727 unsigned int *offset) 728 { 729 struct ibmvnic_long_term_buff *ltb; 730 int nbufs; /* # of buffers in one ltb */ 731 int i; 732 733 WARN_ON_ONCE(bufidx >= txpool->num_buffers); 734 735 for (i = 0; i < txpool->ltb_set.num_ltbs; i++) { 736 ltb = &txpool->ltb_set.ltbs[i]; 737 nbufs = ltb->size / txpool->buf_size; 738 if (bufidx < nbufs) 739 break; 740 bufidx -= nbufs; 741 } 742 743 *ltbp = ltb; 744 *offset = bufidx * txpool->buf_size; 745 } 746 747 static void deactivate_rx_pools(struct ibmvnic_adapter *adapter) 748 { 749 int i; 750 751 for (i = 0; i < adapter->num_active_rx_pools; i++) 752 adapter->rx_pool[i].active = 0; 753 } 754 755 static void replenish_rx_pool(struct ibmvnic_adapter *adapter, 756 struct ibmvnic_rx_pool *pool) 757 { 758 int count = pool->size - atomic_read(&pool->available); 759 u64 handle = adapter->rx_scrq[pool->index]->handle; 760 struct device *dev = &adapter->vdev->dev; 761 struct ibmvnic_ind_xmit_queue *ind_bufp; 762 struct ibmvnic_sub_crq_queue *rx_scrq; 763 struct ibmvnic_long_term_buff *ltb; 764 union sub_crq *sub_crq; 765 int buffers_added = 0; 766 unsigned long lpar_rc; 767 struct sk_buff *skb; 768 unsigned int offset; 769 dma_addr_t dma_addr; 770 unsigned char *dst; 771 int shift = 0; 772 int bufidx; 773 int i; 774 775 if (!pool->active) 776 return; 777 778 rx_scrq = adapter->rx_scrq[pool->index]; 779 ind_bufp = &rx_scrq->ind_buf; 780 781 /* netdev_skb_alloc() could have failed after we saved a few skbs 782 * in the indir_buf and we would not have sent them to VIOS yet. 783 * To account for them, start the loop at ind_bufp->index rather 784 * than 0. If we pushed all the skbs to VIOS, ind_bufp->index will 785 * be 0. 786 */ 787 for (i = ind_bufp->index; i < count; ++i) { 788 bufidx = pool->free_map[pool->next_free]; 789 790 /* We maybe reusing the skb from earlier resets. Allocate 791 * only if necessary. But since the LTB may have changed 792 * during reset (see init_rx_pools()), update LTB below 793 * even if reusing skb. 794 */ 795 skb = pool->rx_buff[bufidx].skb; 796 if (!skb) { 797 skb = netdev_alloc_skb(adapter->netdev, 798 pool->buff_size); 799 if (!skb) { 800 dev_err(dev, "Couldn't replenish rx buff\n"); 801 adapter->replenish_no_mem++; 802 break; 803 } 804 } 805 806 pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP; 807 pool->next_free = (pool->next_free + 1) % pool->size; 808 809 /* Copy the skb to the long term mapped DMA buffer */ 810 map_rxpool_buf_to_ltb(pool, bufidx, <b, &offset); 811 dst = ltb->buff + offset; 812 memset(dst, 0, pool->buff_size); 813 dma_addr = ltb->addr + offset; 814 815 /* add the skb to an rx_buff in the pool */ 816 pool->rx_buff[bufidx].data = dst; 817 pool->rx_buff[bufidx].dma = dma_addr; 818 pool->rx_buff[bufidx].skb = skb; 819 pool->rx_buff[bufidx].pool_index = pool->index; 820 pool->rx_buff[bufidx].size = pool->buff_size; 821 822 /* queue the rx_buff for the next send_subcrq_indirect */ 823 sub_crq = &ind_bufp->indir_arr[ind_bufp->index++]; 824 memset(sub_crq, 0, sizeof(*sub_crq)); 825 sub_crq->rx_add.first = IBMVNIC_CRQ_CMD; 826 sub_crq->rx_add.correlator = 827 cpu_to_be64((u64)&pool->rx_buff[bufidx]); 828 sub_crq->rx_add.ioba = cpu_to_be32(dma_addr); 829 sub_crq->rx_add.map_id = ltb->map_id; 830 831 /* The length field of the sCRQ is defined to be 24 bits so the 832 * buffer size needs to be left shifted by a byte before it is 833 * converted to big endian to prevent the last byte from being 834 * truncated. 835 */ 836 #ifdef __LITTLE_ENDIAN__ 837 shift = 8; 838 #endif 839 sub_crq->rx_add.len = cpu_to_be32(pool->buff_size << shift); 840 841 /* if send_subcrq_indirect queue is full, flush to VIOS */ 842 if (ind_bufp->index == IBMVNIC_MAX_IND_DESCS || 843 i == count - 1) { 844 lpar_rc = 845 send_subcrq_indirect(adapter, handle, 846 (u64)ind_bufp->indir_dma, 847 (u64)ind_bufp->index); 848 if (lpar_rc != H_SUCCESS) 849 goto failure; 850 buffers_added += ind_bufp->index; 851 adapter->replenish_add_buff_success += ind_bufp->index; 852 ind_bufp->index = 0; 853 } 854 } 855 atomic_add(buffers_added, &pool->available); 856 return; 857 858 failure: 859 if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED) 860 dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n"); 861 for (i = ind_bufp->index - 1; i >= 0; --i) { 862 struct ibmvnic_rx_buff *rx_buff; 863 864 pool->next_free = pool->next_free == 0 ? 865 pool->size - 1 : pool->next_free - 1; 866 sub_crq = &ind_bufp->indir_arr[i]; 867 rx_buff = (struct ibmvnic_rx_buff *) 868 be64_to_cpu(sub_crq->rx_add.correlator); 869 bufidx = (int)(rx_buff - pool->rx_buff); 870 pool->free_map[pool->next_free] = bufidx; 871 dev_kfree_skb_any(pool->rx_buff[bufidx].skb); 872 pool->rx_buff[bufidx].skb = NULL; 873 } 874 adapter->replenish_add_buff_failure += ind_bufp->index; 875 atomic_add(buffers_added, &pool->available); 876 ind_bufp->index = 0; 877 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 878 /* Disable buffer pool replenishment and report carrier off if 879 * queue is closed or pending failover. 880 * Firmware guarantees that a signal will be sent to the 881 * driver, triggering a reset. 882 */ 883 deactivate_rx_pools(adapter); 884 netif_carrier_off(adapter->netdev); 885 } 886 } 887 888 static void replenish_pools(struct ibmvnic_adapter *adapter) 889 { 890 int i; 891 892 adapter->replenish_task_cycles++; 893 for (i = 0; i < adapter->num_active_rx_pools; i++) { 894 if (adapter->rx_pool[i].active) 895 replenish_rx_pool(adapter, &adapter->rx_pool[i]); 896 } 897 898 netdev_dbg(adapter->netdev, "Replenished %d pools\n", i); 899 } 900 901 static void release_stats_buffers(struct ibmvnic_adapter *adapter) 902 { 903 kfree(adapter->tx_stats_buffers); 904 kfree(adapter->rx_stats_buffers); 905 adapter->tx_stats_buffers = NULL; 906 adapter->rx_stats_buffers = NULL; 907 } 908 909 static int init_stats_buffers(struct ibmvnic_adapter *adapter) 910 { 911 adapter->tx_stats_buffers = 912 kcalloc(IBMVNIC_MAX_QUEUES, 913 sizeof(struct ibmvnic_tx_queue_stats), 914 GFP_KERNEL); 915 if (!adapter->tx_stats_buffers) 916 return -ENOMEM; 917 918 adapter->rx_stats_buffers = 919 kcalloc(IBMVNIC_MAX_QUEUES, 920 sizeof(struct ibmvnic_rx_queue_stats), 921 GFP_KERNEL); 922 if (!adapter->rx_stats_buffers) 923 return -ENOMEM; 924 925 return 0; 926 } 927 928 static void release_stats_token(struct ibmvnic_adapter *adapter) 929 { 930 struct device *dev = &adapter->vdev->dev; 931 932 if (!adapter->stats_token) 933 return; 934 935 dma_unmap_single(dev, adapter->stats_token, 936 sizeof(struct ibmvnic_statistics), 937 DMA_FROM_DEVICE); 938 adapter->stats_token = 0; 939 } 940 941 static int init_stats_token(struct ibmvnic_adapter *adapter) 942 { 943 struct device *dev = &adapter->vdev->dev; 944 dma_addr_t stok; 945 int rc; 946 947 stok = dma_map_single(dev, &adapter->stats, 948 sizeof(struct ibmvnic_statistics), 949 DMA_FROM_DEVICE); 950 rc = dma_mapping_error(dev, stok); 951 if (rc) { 952 dev_err(dev, "Couldn't map stats buffer, rc = %d\n", rc); 953 return rc; 954 } 955 956 adapter->stats_token = stok; 957 netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok); 958 return 0; 959 } 960 961 /** 962 * release_rx_pools() - Release any rx pools attached to @adapter. 963 * @adapter: ibmvnic adapter 964 * 965 * Safe to call this multiple times - even if no pools are attached. 966 */ 967 static void release_rx_pools(struct ibmvnic_adapter *adapter) 968 { 969 struct ibmvnic_rx_pool *rx_pool; 970 int i, j; 971 972 if (!adapter->rx_pool) 973 return; 974 975 for (i = 0; i < adapter->num_active_rx_pools; i++) { 976 rx_pool = &adapter->rx_pool[i]; 977 978 netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i); 979 980 kfree(rx_pool->free_map); 981 982 free_ltb_set(adapter, &rx_pool->ltb_set); 983 984 if (!rx_pool->rx_buff) 985 continue; 986 987 for (j = 0; j < rx_pool->size; j++) { 988 if (rx_pool->rx_buff[j].skb) { 989 dev_kfree_skb_any(rx_pool->rx_buff[j].skb); 990 rx_pool->rx_buff[j].skb = NULL; 991 } 992 } 993 994 kfree(rx_pool->rx_buff); 995 } 996 997 kfree(adapter->rx_pool); 998 adapter->rx_pool = NULL; 999 adapter->num_active_rx_pools = 0; 1000 adapter->prev_rx_pool_size = 0; 1001 } 1002 1003 /** 1004 * reuse_rx_pools() - Check if the existing rx pools can be reused. 1005 * @adapter: ibmvnic adapter 1006 * 1007 * Check if the existing rx pools in the adapter can be reused. The 1008 * pools can be reused if the pool parameters (number of pools, 1009 * number of buffers in the pool and size of each buffer) have not 1010 * changed. 1011 * 1012 * NOTE: This assumes that all pools have the same number of buffers 1013 * which is the case currently. If that changes, we must fix this. 1014 * 1015 * Return: true if the rx pools can be reused, false otherwise. 1016 */ 1017 static bool reuse_rx_pools(struct ibmvnic_adapter *adapter) 1018 { 1019 u64 old_num_pools, new_num_pools; 1020 u64 old_pool_size, new_pool_size; 1021 u64 old_buff_size, new_buff_size; 1022 1023 if (!adapter->rx_pool) 1024 return false; 1025 1026 old_num_pools = adapter->num_active_rx_pools; 1027 new_num_pools = adapter->req_rx_queues; 1028 1029 old_pool_size = adapter->prev_rx_pool_size; 1030 new_pool_size = adapter->req_rx_add_entries_per_subcrq; 1031 1032 old_buff_size = adapter->prev_rx_buf_sz; 1033 new_buff_size = adapter->cur_rx_buf_sz; 1034 1035 if (old_buff_size != new_buff_size || 1036 old_num_pools != new_num_pools || 1037 old_pool_size != new_pool_size) 1038 return false; 1039 1040 return true; 1041 } 1042 1043 /** 1044 * init_rx_pools(): Initialize the set of receiver pools in the adapter. 1045 * @netdev: net device associated with the vnic interface 1046 * 1047 * Initialize the set of receiver pools in the ibmvnic adapter associated 1048 * with the net_device @netdev. If possible, reuse the existing rx pools. 1049 * Otherwise free any existing pools and allocate a new set of pools 1050 * before initializing them. 1051 * 1052 * Return: 0 on success and negative value on error. 1053 */ 1054 static int init_rx_pools(struct net_device *netdev) 1055 { 1056 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1057 struct device *dev = &adapter->vdev->dev; 1058 struct ibmvnic_rx_pool *rx_pool; 1059 u64 num_pools; 1060 u64 pool_size; /* # of buffers in one pool */ 1061 u64 buff_size; 1062 int i, j, rc; 1063 1064 pool_size = adapter->req_rx_add_entries_per_subcrq; 1065 num_pools = adapter->req_rx_queues; 1066 buff_size = adapter->cur_rx_buf_sz; 1067 1068 if (reuse_rx_pools(adapter)) { 1069 dev_dbg(dev, "Reusing rx pools\n"); 1070 goto update_ltb; 1071 } 1072 1073 /* Allocate/populate the pools. */ 1074 release_rx_pools(adapter); 1075 1076 adapter->rx_pool = kcalloc(num_pools, 1077 sizeof(struct ibmvnic_rx_pool), 1078 GFP_KERNEL); 1079 if (!adapter->rx_pool) { 1080 dev_err(dev, "Failed to allocate rx pools\n"); 1081 return -ENOMEM; 1082 } 1083 1084 /* Set num_active_rx_pools early. If we fail below after partial 1085 * allocation, release_rx_pools() will know how many to look for. 1086 */ 1087 adapter->num_active_rx_pools = num_pools; 1088 1089 for (i = 0; i < num_pools; i++) { 1090 rx_pool = &adapter->rx_pool[i]; 1091 1092 netdev_dbg(adapter->netdev, 1093 "Initializing rx_pool[%d], %lld buffs, %lld bytes each\n", 1094 i, pool_size, buff_size); 1095 1096 rx_pool->size = pool_size; 1097 rx_pool->index = i; 1098 rx_pool->buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 1099 1100 rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int), 1101 GFP_KERNEL); 1102 if (!rx_pool->free_map) { 1103 dev_err(dev, "Couldn't alloc free_map %d\n", i); 1104 rc = -ENOMEM; 1105 goto out_release; 1106 } 1107 1108 rx_pool->rx_buff = kcalloc(rx_pool->size, 1109 sizeof(struct ibmvnic_rx_buff), 1110 GFP_KERNEL); 1111 if (!rx_pool->rx_buff) { 1112 dev_err(dev, "Couldn't alloc rx buffers\n"); 1113 rc = -ENOMEM; 1114 goto out_release; 1115 } 1116 } 1117 1118 adapter->prev_rx_pool_size = pool_size; 1119 adapter->prev_rx_buf_sz = adapter->cur_rx_buf_sz; 1120 1121 update_ltb: 1122 for (i = 0; i < num_pools; i++) { 1123 rx_pool = &adapter->rx_pool[i]; 1124 dev_dbg(dev, "Updating LTB for rx pool %d [%d, %d]\n", 1125 i, rx_pool->size, rx_pool->buff_size); 1126 1127 rc = alloc_ltb_set(adapter, &rx_pool->ltb_set, 1128 rx_pool->size, rx_pool->buff_size); 1129 if (rc) 1130 goto out; 1131 1132 for (j = 0; j < rx_pool->size; ++j) { 1133 struct ibmvnic_rx_buff *rx_buff; 1134 1135 rx_pool->free_map[j] = j; 1136 1137 /* NOTE: Don't clear rx_buff->skb here - will leak 1138 * memory! replenish_rx_pool() will reuse skbs or 1139 * allocate as necessary. 1140 */ 1141 rx_buff = &rx_pool->rx_buff[j]; 1142 rx_buff->dma = 0; 1143 rx_buff->data = 0; 1144 rx_buff->size = 0; 1145 rx_buff->pool_index = 0; 1146 } 1147 1148 /* Mark pool "empty" so replenish_rx_pools() will 1149 * update the LTB info for each buffer 1150 */ 1151 atomic_set(&rx_pool->available, 0); 1152 rx_pool->next_alloc = 0; 1153 rx_pool->next_free = 0; 1154 /* replenish_rx_pool() may have called deactivate_rx_pools() 1155 * on failover. Ensure pool is active now. 1156 */ 1157 rx_pool->active = 1; 1158 } 1159 return 0; 1160 out_release: 1161 release_rx_pools(adapter); 1162 out: 1163 /* We failed to allocate one or more LTBs or map them on the VIOS. 1164 * Hold onto the pools and any LTBs that we did allocate/map. 1165 */ 1166 return rc; 1167 } 1168 1169 static void release_vpd_data(struct ibmvnic_adapter *adapter) 1170 { 1171 if (!adapter->vpd) 1172 return; 1173 1174 kfree(adapter->vpd->buff); 1175 kfree(adapter->vpd); 1176 1177 adapter->vpd = NULL; 1178 } 1179 1180 static void release_one_tx_pool(struct ibmvnic_adapter *adapter, 1181 struct ibmvnic_tx_pool *tx_pool) 1182 { 1183 kfree(tx_pool->tx_buff); 1184 kfree(tx_pool->free_map); 1185 free_ltb_set(adapter, &tx_pool->ltb_set); 1186 } 1187 1188 /** 1189 * release_tx_pools() - Release any tx pools attached to @adapter. 1190 * @adapter: ibmvnic adapter 1191 * 1192 * Safe to call this multiple times - even if no pools are attached. 1193 */ 1194 static void release_tx_pools(struct ibmvnic_adapter *adapter) 1195 { 1196 int i; 1197 1198 /* init_tx_pools() ensures that ->tx_pool and ->tso_pool are 1199 * both NULL or both non-NULL. So we only need to check one. 1200 */ 1201 if (!adapter->tx_pool) 1202 return; 1203 1204 for (i = 0; i < adapter->num_active_tx_pools; i++) { 1205 release_one_tx_pool(adapter, &adapter->tx_pool[i]); 1206 release_one_tx_pool(adapter, &adapter->tso_pool[i]); 1207 } 1208 1209 kfree(adapter->tx_pool); 1210 adapter->tx_pool = NULL; 1211 kfree(adapter->tso_pool); 1212 adapter->tso_pool = NULL; 1213 adapter->num_active_tx_pools = 0; 1214 adapter->prev_tx_pool_size = 0; 1215 } 1216 1217 static int init_one_tx_pool(struct net_device *netdev, 1218 struct ibmvnic_tx_pool *tx_pool, 1219 int pool_size, int buf_size) 1220 { 1221 int i; 1222 1223 tx_pool->tx_buff = kcalloc(pool_size, 1224 sizeof(struct ibmvnic_tx_buff), 1225 GFP_KERNEL); 1226 if (!tx_pool->tx_buff) 1227 return -ENOMEM; 1228 1229 tx_pool->free_map = kcalloc(pool_size, sizeof(int), GFP_KERNEL); 1230 if (!tx_pool->free_map) { 1231 kfree(tx_pool->tx_buff); 1232 tx_pool->tx_buff = NULL; 1233 return -ENOMEM; 1234 } 1235 1236 for (i = 0; i < pool_size; i++) 1237 tx_pool->free_map[i] = i; 1238 1239 tx_pool->consumer_index = 0; 1240 tx_pool->producer_index = 0; 1241 tx_pool->num_buffers = pool_size; 1242 tx_pool->buf_size = buf_size; 1243 1244 return 0; 1245 } 1246 1247 /** 1248 * reuse_tx_pools() - Check if the existing tx pools can be reused. 1249 * @adapter: ibmvnic adapter 1250 * 1251 * Check if the existing tx pools in the adapter can be reused. The 1252 * pools can be reused if the pool parameters (number of pools, 1253 * number of buffers in the pool and mtu) have not changed. 1254 * 1255 * NOTE: This assumes that all pools have the same number of buffers 1256 * which is the case currently. If that changes, we must fix this. 1257 * 1258 * Return: true if the tx pools can be reused, false otherwise. 1259 */ 1260 static bool reuse_tx_pools(struct ibmvnic_adapter *adapter) 1261 { 1262 u64 old_num_pools, new_num_pools; 1263 u64 old_pool_size, new_pool_size; 1264 u64 old_mtu, new_mtu; 1265 1266 if (!adapter->tx_pool) 1267 return false; 1268 1269 old_num_pools = adapter->num_active_tx_pools; 1270 new_num_pools = adapter->num_active_tx_scrqs; 1271 old_pool_size = adapter->prev_tx_pool_size; 1272 new_pool_size = adapter->req_tx_entries_per_subcrq; 1273 old_mtu = adapter->prev_mtu; 1274 new_mtu = adapter->req_mtu; 1275 1276 if (old_mtu != new_mtu || 1277 old_num_pools != new_num_pools || 1278 old_pool_size != new_pool_size) 1279 return false; 1280 1281 return true; 1282 } 1283 1284 /** 1285 * init_tx_pools(): Initialize the set of transmit pools in the adapter. 1286 * @netdev: net device associated with the vnic interface 1287 * 1288 * Initialize the set of transmit pools in the ibmvnic adapter associated 1289 * with the net_device @netdev. If possible, reuse the existing tx pools. 1290 * Otherwise free any existing pools and allocate a new set of pools 1291 * before initializing them. 1292 * 1293 * Return: 0 on success and negative value on error. 1294 */ 1295 static int init_tx_pools(struct net_device *netdev) 1296 { 1297 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1298 struct device *dev = &adapter->vdev->dev; 1299 int num_pools; 1300 u64 pool_size; /* # of buffers in pool */ 1301 u64 buff_size; 1302 int i, j, rc; 1303 1304 num_pools = adapter->req_tx_queues; 1305 1306 /* We must notify the VIOS about the LTB on all resets - but we only 1307 * need to alloc/populate pools if either the number of buffers or 1308 * size of each buffer in the pool has changed. 1309 */ 1310 if (reuse_tx_pools(adapter)) { 1311 netdev_dbg(netdev, "Reusing tx pools\n"); 1312 goto update_ltb; 1313 } 1314 1315 /* Allocate/populate the pools. */ 1316 release_tx_pools(adapter); 1317 1318 pool_size = adapter->req_tx_entries_per_subcrq; 1319 num_pools = adapter->num_active_tx_scrqs; 1320 1321 adapter->tx_pool = kcalloc(num_pools, 1322 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 1323 if (!adapter->tx_pool) 1324 return -ENOMEM; 1325 1326 adapter->tso_pool = kcalloc(num_pools, 1327 sizeof(struct ibmvnic_tx_pool), GFP_KERNEL); 1328 /* To simplify release_tx_pools() ensure that ->tx_pool and 1329 * ->tso_pool are either both NULL or both non-NULL. 1330 */ 1331 if (!adapter->tso_pool) { 1332 kfree(adapter->tx_pool); 1333 adapter->tx_pool = NULL; 1334 return -ENOMEM; 1335 } 1336 1337 /* Set num_active_tx_pools early. If we fail below after partial 1338 * allocation, release_tx_pools() will know how many to look for. 1339 */ 1340 adapter->num_active_tx_pools = num_pools; 1341 1342 buff_size = adapter->req_mtu + VLAN_HLEN; 1343 buff_size = ALIGN(buff_size, L1_CACHE_BYTES); 1344 1345 for (i = 0; i < num_pools; i++) { 1346 dev_dbg(dev, "Init tx pool %d [%llu, %llu]\n", 1347 i, adapter->req_tx_entries_per_subcrq, buff_size); 1348 1349 rc = init_one_tx_pool(netdev, &adapter->tx_pool[i], 1350 pool_size, buff_size); 1351 if (rc) 1352 goto out_release; 1353 1354 rc = init_one_tx_pool(netdev, &adapter->tso_pool[i], 1355 IBMVNIC_TSO_BUFS, 1356 IBMVNIC_TSO_BUF_SZ); 1357 if (rc) 1358 goto out_release; 1359 } 1360 1361 adapter->prev_tx_pool_size = pool_size; 1362 adapter->prev_mtu = adapter->req_mtu; 1363 1364 update_ltb: 1365 /* NOTE: All tx_pools have the same number of buffers (which is 1366 * same as pool_size). All tso_pools have IBMVNIC_TSO_BUFS 1367 * buffers (see calls init_one_tx_pool() for these). 1368 * For consistency, we use tx_pool->num_buffers and 1369 * tso_pool->num_buffers below. 1370 */ 1371 rc = -1; 1372 for (i = 0; i < num_pools; i++) { 1373 struct ibmvnic_tx_pool *tso_pool; 1374 struct ibmvnic_tx_pool *tx_pool; 1375 1376 tx_pool = &adapter->tx_pool[i]; 1377 1378 dev_dbg(dev, "Updating LTB for tx pool %d [%d, %d]\n", 1379 i, tx_pool->num_buffers, tx_pool->buf_size); 1380 1381 rc = alloc_ltb_set(adapter, &tx_pool->ltb_set, 1382 tx_pool->num_buffers, tx_pool->buf_size); 1383 if (rc) 1384 goto out; 1385 1386 tx_pool->consumer_index = 0; 1387 tx_pool->producer_index = 0; 1388 1389 for (j = 0; j < tx_pool->num_buffers; j++) 1390 tx_pool->free_map[j] = j; 1391 1392 tso_pool = &adapter->tso_pool[i]; 1393 1394 dev_dbg(dev, "Updating LTB for tso pool %d [%d, %d]\n", 1395 i, tso_pool->num_buffers, tso_pool->buf_size); 1396 1397 rc = alloc_ltb_set(adapter, &tso_pool->ltb_set, 1398 tso_pool->num_buffers, tso_pool->buf_size); 1399 if (rc) 1400 goto out; 1401 1402 tso_pool->consumer_index = 0; 1403 tso_pool->producer_index = 0; 1404 1405 for (j = 0; j < tso_pool->num_buffers; j++) 1406 tso_pool->free_map[j] = j; 1407 } 1408 1409 return 0; 1410 out_release: 1411 release_tx_pools(adapter); 1412 out: 1413 /* We failed to allocate one or more LTBs or map them on the VIOS. 1414 * Hold onto the pools and any LTBs that we did allocate/map. 1415 */ 1416 return rc; 1417 } 1418 1419 static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter) 1420 { 1421 int i; 1422 1423 if (adapter->napi_enabled) 1424 return; 1425 1426 for (i = 0; i < adapter->req_rx_queues; i++) 1427 napi_enable(&adapter->napi[i]); 1428 1429 adapter->napi_enabled = true; 1430 } 1431 1432 static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter) 1433 { 1434 int i; 1435 1436 if (!adapter->napi_enabled) 1437 return; 1438 1439 for (i = 0; i < adapter->req_rx_queues; i++) { 1440 netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i); 1441 napi_disable(&adapter->napi[i]); 1442 } 1443 1444 adapter->napi_enabled = false; 1445 } 1446 1447 static int init_napi(struct ibmvnic_adapter *adapter) 1448 { 1449 int i; 1450 1451 adapter->napi = kcalloc(adapter->req_rx_queues, 1452 sizeof(struct napi_struct), GFP_KERNEL); 1453 if (!adapter->napi) 1454 return -ENOMEM; 1455 1456 for (i = 0; i < adapter->req_rx_queues; i++) { 1457 netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i); 1458 netif_napi_add(adapter->netdev, &adapter->napi[i], 1459 ibmvnic_poll); 1460 } 1461 1462 adapter->num_active_rx_napi = adapter->req_rx_queues; 1463 return 0; 1464 } 1465 1466 static void release_napi(struct ibmvnic_adapter *adapter) 1467 { 1468 int i; 1469 1470 if (!adapter->napi) 1471 return; 1472 1473 for (i = 0; i < adapter->num_active_rx_napi; i++) { 1474 netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i); 1475 netif_napi_del(&adapter->napi[i]); 1476 } 1477 1478 kfree(adapter->napi); 1479 adapter->napi = NULL; 1480 adapter->num_active_rx_napi = 0; 1481 adapter->napi_enabled = false; 1482 } 1483 1484 static const char *adapter_state_to_string(enum vnic_state state) 1485 { 1486 switch (state) { 1487 case VNIC_PROBING: 1488 return "PROBING"; 1489 case VNIC_PROBED: 1490 return "PROBED"; 1491 case VNIC_OPENING: 1492 return "OPENING"; 1493 case VNIC_OPEN: 1494 return "OPEN"; 1495 case VNIC_CLOSING: 1496 return "CLOSING"; 1497 case VNIC_CLOSED: 1498 return "CLOSED"; 1499 case VNIC_REMOVING: 1500 return "REMOVING"; 1501 case VNIC_REMOVED: 1502 return "REMOVED"; 1503 case VNIC_DOWN: 1504 return "DOWN"; 1505 } 1506 return "UNKNOWN"; 1507 } 1508 1509 static int ibmvnic_login(struct net_device *netdev) 1510 { 1511 unsigned long flags, timeout = msecs_to_jiffies(20000); 1512 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1513 int retry_count = 0; 1514 int retries = 10; 1515 bool retry; 1516 int rc; 1517 1518 do { 1519 retry = false; 1520 if (retry_count > retries) { 1521 netdev_warn(netdev, "Login attempts exceeded\n"); 1522 return -EACCES; 1523 } 1524 1525 adapter->init_done_rc = 0; 1526 reinit_completion(&adapter->init_done); 1527 rc = send_login(adapter); 1528 if (rc) 1529 return rc; 1530 1531 if (!wait_for_completion_timeout(&adapter->init_done, 1532 timeout)) { 1533 netdev_warn(netdev, "Login timed out\n"); 1534 adapter->login_pending = false; 1535 goto partial_reset; 1536 } 1537 1538 if (adapter->init_done_rc == ABORTED) { 1539 netdev_warn(netdev, "Login aborted, retrying...\n"); 1540 retry = true; 1541 adapter->init_done_rc = 0; 1542 retry_count++; 1543 /* FW or device may be busy, so 1544 * wait a bit before retrying login 1545 */ 1546 msleep(500); 1547 } else if (adapter->init_done_rc == PARTIALSUCCESS) { 1548 retry_count++; 1549 release_sub_crqs(adapter, 1); 1550 1551 retry = true; 1552 netdev_dbg(netdev, 1553 "Received partial success, retrying...\n"); 1554 adapter->init_done_rc = 0; 1555 reinit_completion(&adapter->init_done); 1556 send_query_cap(adapter); 1557 if (!wait_for_completion_timeout(&adapter->init_done, 1558 timeout)) { 1559 netdev_warn(netdev, 1560 "Capabilities query timed out\n"); 1561 return -ETIMEDOUT; 1562 } 1563 1564 rc = init_sub_crqs(adapter); 1565 if (rc) { 1566 netdev_warn(netdev, 1567 "SCRQ initialization failed\n"); 1568 return rc; 1569 } 1570 1571 rc = init_sub_crq_irqs(adapter); 1572 if (rc) { 1573 netdev_warn(netdev, 1574 "SCRQ irq initialization failed\n"); 1575 return rc; 1576 } 1577 /* Default/timeout error handling, reset and start fresh */ 1578 } else if (adapter->init_done_rc) { 1579 netdev_warn(netdev, "Adapter login failed, init_done_rc = %d\n", 1580 adapter->init_done_rc); 1581 1582 partial_reset: 1583 /* adapter login failed, so free any CRQs or sub-CRQs 1584 * and register again before attempting to login again. 1585 * If we don't do this then the VIOS may think that 1586 * we are already logged in and reject any subsequent 1587 * attempts 1588 */ 1589 netdev_warn(netdev, 1590 "Freeing and re-registering CRQs before attempting to login again\n"); 1591 retry = true; 1592 adapter->init_done_rc = 0; 1593 release_sub_crqs(adapter, true); 1594 /* Much of this is similar logic as ibmvnic_probe(), 1595 * we are essentially re-initializing communication 1596 * with the server. We really should not run any 1597 * resets/failovers here because this is already a form 1598 * of reset and we do not want parallel resets occurring 1599 */ 1600 do { 1601 reinit_init_done(adapter); 1602 /* Clear any failovers we got in the previous 1603 * pass since we are re-initializing the CRQ 1604 */ 1605 adapter->failover_pending = false; 1606 release_crq_queue(adapter); 1607 /* If we don't sleep here then we risk an 1608 * unnecessary failover event from the VIOS. 1609 * This is a known VIOS issue caused by a vnic 1610 * device freeing and registering a CRQ too 1611 * quickly. 1612 */ 1613 msleep(1500); 1614 /* Avoid any resets, since we are currently 1615 * resetting. 1616 */ 1617 spin_lock_irqsave(&adapter->rwi_lock, flags); 1618 flush_reset_queue(adapter); 1619 spin_unlock_irqrestore(&adapter->rwi_lock, 1620 flags); 1621 1622 rc = init_crq_queue(adapter); 1623 if (rc) { 1624 netdev_err(netdev, "login recovery: init CRQ failed %d\n", 1625 rc); 1626 return -EIO; 1627 } 1628 1629 rc = ibmvnic_reset_init(adapter, false); 1630 if (rc) 1631 netdev_err(netdev, "login recovery: Reset init failed %d\n", 1632 rc); 1633 /* IBMVNIC_CRQ_INIT will return EAGAIN if it 1634 * fails, since ibmvnic_reset_init will free 1635 * irq's in failure, we won't be able to receive 1636 * new CRQs so we need to keep trying. probe() 1637 * handles this similarly. 1638 */ 1639 } while (rc == -EAGAIN && retry_count++ < retries); 1640 } 1641 } while (retry); 1642 1643 __ibmvnic_set_mac(netdev, adapter->mac_addr); 1644 1645 netdev_dbg(netdev, "[S:%s] Login succeeded\n", adapter_state_to_string(adapter->state)); 1646 return 0; 1647 } 1648 1649 static void release_login_buffer(struct ibmvnic_adapter *adapter) 1650 { 1651 if (!adapter->login_buf) 1652 return; 1653 1654 dma_unmap_single(&adapter->vdev->dev, adapter->login_buf_token, 1655 adapter->login_buf_sz, DMA_TO_DEVICE); 1656 kfree(adapter->login_buf); 1657 adapter->login_buf = NULL; 1658 } 1659 1660 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter) 1661 { 1662 if (!adapter->login_rsp_buf) 1663 return; 1664 1665 dma_unmap_single(&adapter->vdev->dev, adapter->login_rsp_buf_token, 1666 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE); 1667 kfree(adapter->login_rsp_buf); 1668 adapter->login_rsp_buf = NULL; 1669 } 1670 1671 static void release_resources(struct ibmvnic_adapter *adapter) 1672 { 1673 release_vpd_data(adapter); 1674 1675 release_napi(adapter); 1676 release_login_buffer(adapter); 1677 release_login_rsp_buffer(adapter); 1678 } 1679 1680 static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state) 1681 { 1682 struct net_device *netdev = adapter->netdev; 1683 unsigned long timeout = msecs_to_jiffies(20000); 1684 union ibmvnic_crq crq; 1685 bool resend; 1686 int rc; 1687 1688 netdev_dbg(netdev, "setting link state %d\n", link_state); 1689 1690 memset(&crq, 0, sizeof(crq)); 1691 crq.logical_link_state.first = IBMVNIC_CRQ_CMD; 1692 crq.logical_link_state.cmd = LOGICAL_LINK_STATE; 1693 crq.logical_link_state.link_state = link_state; 1694 1695 do { 1696 resend = false; 1697 1698 reinit_completion(&adapter->init_done); 1699 rc = ibmvnic_send_crq(adapter, &crq); 1700 if (rc) { 1701 netdev_err(netdev, "Failed to set link state\n"); 1702 return rc; 1703 } 1704 1705 if (!wait_for_completion_timeout(&adapter->init_done, 1706 timeout)) { 1707 netdev_err(netdev, "timeout setting link state\n"); 1708 return -ETIMEDOUT; 1709 } 1710 1711 if (adapter->init_done_rc == PARTIALSUCCESS) { 1712 /* Partuial success, delay and re-send */ 1713 mdelay(1000); 1714 resend = true; 1715 } else if (adapter->init_done_rc) { 1716 netdev_warn(netdev, "Unable to set link state, rc=%d\n", 1717 adapter->init_done_rc); 1718 return adapter->init_done_rc; 1719 } 1720 } while (resend); 1721 1722 return 0; 1723 } 1724 1725 static int set_real_num_queues(struct net_device *netdev) 1726 { 1727 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1728 int rc; 1729 1730 netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n", 1731 adapter->req_tx_queues, adapter->req_rx_queues); 1732 1733 rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues); 1734 if (rc) { 1735 netdev_err(netdev, "failed to set the number of tx queues\n"); 1736 return rc; 1737 } 1738 1739 rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues); 1740 if (rc) 1741 netdev_err(netdev, "failed to set the number of rx queues\n"); 1742 1743 return rc; 1744 } 1745 1746 static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter) 1747 { 1748 struct device *dev = &adapter->vdev->dev; 1749 union ibmvnic_crq crq; 1750 int len = 0; 1751 int rc; 1752 1753 if (adapter->vpd->buff) 1754 len = adapter->vpd->len; 1755 1756 mutex_lock(&adapter->fw_lock); 1757 adapter->fw_done_rc = 0; 1758 reinit_completion(&adapter->fw_done); 1759 1760 crq.get_vpd_size.first = IBMVNIC_CRQ_CMD; 1761 crq.get_vpd_size.cmd = GET_VPD_SIZE; 1762 rc = ibmvnic_send_crq(adapter, &crq); 1763 if (rc) { 1764 mutex_unlock(&adapter->fw_lock); 1765 return rc; 1766 } 1767 1768 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1769 if (rc) { 1770 dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc); 1771 mutex_unlock(&adapter->fw_lock); 1772 return rc; 1773 } 1774 mutex_unlock(&adapter->fw_lock); 1775 1776 if (!adapter->vpd->len) 1777 return -ENODATA; 1778 1779 if (!adapter->vpd->buff) 1780 adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL); 1781 else if (adapter->vpd->len != len) 1782 adapter->vpd->buff = 1783 krealloc(adapter->vpd->buff, 1784 adapter->vpd->len, GFP_KERNEL); 1785 1786 if (!adapter->vpd->buff) { 1787 dev_err(dev, "Could allocate VPD buffer\n"); 1788 return -ENOMEM; 1789 } 1790 1791 adapter->vpd->dma_addr = 1792 dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len, 1793 DMA_FROM_DEVICE); 1794 if (dma_mapping_error(dev, adapter->vpd->dma_addr)) { 1795 dev_err(dev, "Could not map VPD buffer\n"); 1796 kfree(adapter->vpd->buff); 1797 adapter->vpd->buff = NULL; 1798 return -ENOMEM; 1799 } 1800 1801 mutex_lock(&adapter->fw_lock); 1802 adapter->fw_done_rc = 0; 1803 reinit_completion(&adapter->fw_done); 1804 1805 crq.get_vpd.first = IBMVNIC_CRQ_CMD; 1806 crq.get_vpd.cmd = GET_VPD; 1807 crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr); 1808 crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len); 1809 rc = ibmvnic_send_crq(adapter, &crq); 1810 if (rc) { 1811 kfree(adapter->vpd->buff); 1812 adapter->vpd->buff = NULL; 1813 mutex_unlock(&adapter->fw_lock); 1814 return rc; 1815 } 1816 1817 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 1818 if (rc) { 1819 dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc); 1820 kfree(adapter->vpd->buff); 1821 adapter->vpd->buff = NULL; 1822 mutex_unlock(&adapter->fw_lock); 1823 return rc; 1824 } 1825 1826 mutex_unlock(&adapter->fw_lock); 1827 return 0; 1828 } 1829 1830 static int init_resources(struct ibmvnic_adapter *adapter) 1831 { 1832 struct net_device *netdev = adapter->netdev; 1833 int rc; 1834 1835 rc = set_real_num_queues(netdev); 1836 if (rc) 1837 return rc; 1838 1839 adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL); 1840 if (!adapter->vpd) 1841 return -ENOMEM; 1842 1843 /* Vital Product Data (VPD) */ 1844 rc = ibmvnic_get_vpd(adapter); 1845 if (rc) { 1846 netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n"); 1847 return rc; 1848 } 1849 1850 rc = init_napi(adapter); 1851 if (rc) 1852 return rc; 1853 1854 send_query_map(adapter); 1855 1856 rc = init_rx_pools(netdev); 1857 if (rc) 1858 return rc; 1859 1860 rc = init_tx_pools(netdev); 1861 return rc; 1862 } 1863 1864 static int __ibmvnic_open(struct net_device *netdev) 1865 { 1866 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1867 enum vnic_state prev_state = adapter->state; 1868 int i, rc; 1869 1870 adapter->state = VNIC_OPENING; 1871 replenish_pools(adapter); 1872 ibmvnic_napi_enable(adapter); 1873 1874 /* We're ready to receive frames, enable the sub-crq interrupts and 1875 * set the logical link state to up 1876 */ 1877 for (i = 0; i < adapter->req_rx_queues; i++) { 1878 netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i); 1879 if (prev_state == VNIC_CLOSED) 1880 enable_irq(adapter->rx_scrq[i]->irq); 1881 enable_scrq_irq(adapter, adapter->rx_scrq[i]); 1882 } 1883 1884 for (i = 0; i < adapter->req_tx_queues; i++) { 1885 netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i); 1886 if (prev_state == VNIC_CLOSED) 1887 enable_irq(adapter->tx_scrq[i]->irq); 1888 enable_scrq_irq(adapter, adapter->tx_scrq[i]); 1889 /* netdev_tx_reset_queue will reset dql stats. During NON_FATAL 1890 * resets, don't reset the stats because there could be batched 1891 * skb's waiting to be sent. If we reset dql stats, we risk 1892 * num_completed being greater than num_queued. This will cause 1893 * a BUG_ON in dql_completed(). 1894 */ 1895 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) 1896 netdev_tx_reset_queue(netdev_get_tx_queue(netdev, i)); 1897 } 1898 1899 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP); 1900 if (rc) { 1901 ibmvnic_napi_disable(adapter); 1902 ibmvnic_disable_irqs(adapter); 1903 return rc; 1904 } 1905 1906 adapter->tx_queues_active = true; 1907 1908 /* Since queues were stopped until now, there shouldn't be any 1909 * one in ibmvnic_complete_tx() or ibmvnic_xmit() so maybe we 1910 * don't need the synchronize_rcu()? Leaving it for consistency 1911 * with setting ->tx_queues_active = false. 1912 */ 1913 synchronize_rcu(); 1914 1915 netif_tx_start_all_queues(netdev); 1916 1917 if (prev_state == VNIC_CLOSED) { 1918 for (i = 0; i < adapter->req_rx_queues; i++) 1919 napi_schedule(&adapter->napi[i]); 1920 } 1921 1922 adapter->state = VNIC_OPEN; 1923 return rc; 1924 } 1925 1926 static int ibmvnic_open(struct net_device *netdev) 1927 { 1928 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 1929 int rc; 1930 1931 ASSERT_RTNL(); 1932 1933 /* If device failover is pending or we are about to reset, just set 1934 * device state and return. Device operation will be handled by reset 1935 * routine. 1936 * 1937 * It should be safe to overwrite the adapter->state here. Since 1938 * we hold the rtnl, either the reset has not actually started or 1939 * the rtnl got dropped during the set_link_state() in do_reset(). 1940 * In the former case, no one else is changing the state (again we 1941 * have the rtnl) and in the latter case, do_reset() will detect and 1942 * honor our setting below. 1943 */ 1944 if (adapter->failover_pending || (test_bit(0, &adapter->resetting))) { 1945 netdev_dbg(netdev, "[S:%s FOP:%d] Resetting, deferring open\n", 1946 adapter_state_to_string(adapter->state), 1947 adapter->failover_pending); 1948 adapter->state = VNIC_OPEN; 1949 rc = 0; 1950 goto out; 1951 } 1952 1953 if (adapter->state != VNIC_CLOSED) { 1954 rc = ibmvnic_login(netdev); 1955 if (rc) 1956 goto out; 1957 1958 rc = init_resources(adapter); 1959 if (rc) { 1960 netdev_err(netdev, "failed to initialize resources\n"); 1961 goto out; 1962 } 1963 } 1964 1965 rc = __ibmvnic_open(netdev); 1966 1967 out: 1968 /* If open failed and there is a pending failover or in-progress reset, 1969 * set device state and return. Device operation will be handled by 1970 * reset routine. See also comments above regarding rtnl. 1971 */ 1972 if (rc && 1973 (adapter->failover_pending || (test_bit(0, &adapter->resetting)))) { 1974 adapter->state = VNIC_OPEN; 1975 rc = 0; 1976 } 1977 1978 if (rc) { 1979 release_resources(adapter); 1980 release_rx_pools(adapter); 1981 release_tx_pools(adapter); 1982 } 1983 1984 return rc; 1985 } 1986 1987 static void clean_rx_pools(struct ibmvnic_adapter *adapter) 1988 { 1989 struct ibmvnic_rx_pool *rx_pool; 1990 struct ibmvnic_rx_buff *rx_buff; 1991 u64 rx_entries; 1992 int rx_scrqs; 1993 int i, j; 1994 1995 if (!adapter->rx_pool) 1996 return; 1997 1998 rx_scrqs = adapter->num_active_rx_pools; 1999 rx_entries = adapter->req_rx_add_entries_per_subcrq; 2000 2001 /* Free any remaining skbs in the rx buffer pools */ 2002 for (i = 0; i < rx_scrqs; i++) { 2003 rx_pool = &adapter->rx_pool[i]; 2004 if (!rx_pool || !rx_pool->rx_buff) 2005 continue; 2006 2007 netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i); 2008 for (j = 0; j < rx_entries; j++) { 2009 rx_buff = &rx_pool->rx_buff[j]; 2010 if (rx_buff && rx_buff->skb) { 2011 dev_kfree_skb_any(rx_buff->skb); 2012 rx_buff->skb = NULL; 2013 } 2014 } 2015 } 2016 } 2017 2018 static void clean_one_tx_pool(struct ibmvnic_adapter *adapter, 2019 struct ibmvnic_tx_pool *tx_pool) 2020 { 2021 struct ibmvnic_tx_buff *tx_buff; 2022 u64 tx_entries; 2023 int i; 2024 2025 if (!tx_pool || !tx_pool->tx_buff) 2026 return; 2027 2028 tx_entries = tx_pool->num_buffers; 2029 2030 for (i = 0; i < tx_entries; i++) { 2031 tx_buff = &tx_pool->tx_buff[i]; 2032 if (tx_buff && tx_buff->skb) { 2033 dev_kfree_skb_any(tx_buff->skb); 2034 tx_buff->skb = NULL; 2035 } 2036 } 2037 } 2038 2039 static void clean_tx_pools(struct ibmvnic_adapter *adapter) 2040 { 2041 int tx_scrqs; 2042 int i; 2043 2044 if (!adapter->tx_pool || !adapter->tso_pool) 2045 return; 2046 2047 tx_scrqs = adapter->num_active_tx_pools; 2048 2049 /* Free any remaining skbs in the tx buffer pools */ 2050 for (i = 0; i < tx_scrqs; i++) { 2051 netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i); 2052 clean_one_tx_pool(adapter, &adapter->tx_pool[i]); 2053 clean_one_tx_pool(adapter, &adapter->tso_pool[i]); 2054 } 2055 } 2056 2057 static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter) 2058 { 2059 struct net_device *netdev = adapter->netdev; 2060 int i; 2061 2062 if (adapter->tx_scrq) { 2063 for (i = 0; i < adapter->req_tx_queues; i++) 2064 if (adapter->tx_scrq[i]->irq) { 2065 netdev_dbg(netdev, 2066 "Disabling tx_scrq[%d] irq\n", i); 2067 disable_scrq_irq(adapter, adapter->tx_scrq[i]); 2068 disable_irq(adapter->tx_scrq[i]->irq); 2069 } 2070 } 2071 2072 if (adapter->rx_scrq) { 2073 for (i = 0; i < adapter->req_rx_queues; i++) { 2074 if (adapter->rx_scrq[i]->irq) { 2075 netdev_dbg(netdev, 2076 "Disabling rx_scrq[%d] irq\n", i); 2077 disable_scrq_irq(adapter, adapter->rx_scrq[i]); 2078 disable_irq(adapter->rx_scrq[i]->irq); 2079 } 2080 } 2081 } 2082 } 2083 2084 static void ibmvnic_cleanup(struct net_device *netdev) 2085 { 2086 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2087 2088 /* ensure that transmissions are stopped if called by do_reset */ 2089 2090 adapter->tx_queues_active = false; 2091 2092 /* Ensure complete_tx() and ibmvnic_xmit() see ->tx_queues_active 2093 * update so they don't restart a queue after we stop it below. 2094 */ 2095 synchronize_rcu(); 2096 2097 if (test_bit(0, &adapter->resetting)) 2098 netif_tx_disable(netdev); 2099 else 2100 netif_tx_stop_all_queues(netdev); 2101 2102 ibmvnic_napi_disable(adapter); 2103 ibmvnic_disable_irqs(adapter); 2104 } 2105 2106 static int __ibmvnic_close(struct net_device *netdev) 2107 { 2108 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2109 int rc = 0; 2110 2111 adapter->state = VNIC_CLOSING; 2112 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2113 adapter->state = VNIC_CLOSED; 2114 return rc; 2115 } 2116 2117 static int ibmvnic_close(struct net_device *netdev) 2118 { 2119 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2120 int rc; 2121 2122 netdev_dbg(netdev, "[S:%s FOP:%d FRR:%d] Closing\n", 2123 adapter_state_to_string(adapter->state), 2124 adapter->failover_pending, 2125 adapter->force_reset_recovery); 2126 2127 /* If device failover is pending, just set device state and return. 2128 * Device operation will be handled by reset routine. 2129 */ 2130 if (adapter->failover_pending) { 2131 adapter->state = VNIC_CLOSED; 2132 return 0; 2133 } 2134 2135 rc = __ibmvnic_close(netdev); 2136 ibmvnic_cleanup(netdev); 2137 clean_rx_pools(adapter); 2138 clean_tx_pools(adapter); 2139 2140 return rc; 2141 } 2142 2143 /** 2144 * get_hdr_lens - fills list of L2/L3/L4 hdr lens 2145 * @hdr_field: bitfield determining needed headers 2146 * @skb: socket buffer 2147 * @hdr_len: array of header lengths to be filled 2148 * 2149 * Reads hdr_field to determine which headers are needed by firmware. 2150 * Builds a buffer containing these headers. Saves individual header 2151 * lengths and total buffer length to be used to build descriptors. 2152 * 2153 * Return: total len of all headers 2154 */ 2155 static int get_hdr_lens(u8 hdr_field, struct sk_buff *skb, 2156 int *hdr_len) 2157 { 2158 int len = 0; 2159 2160 2161 if ((hdr_field >> 6) & 1) { 2162 hdr_len[0] = skb_mac_header_len(skb); 2163 len += hdr_len[0]; 2164 } 2165 2166 if ((hdr_field >> 5) & 1) { 2167 hdr_len[1] = skb_network_header_len(skb); 2168 len += hdr_len[1]; 2169 } 2170 2171 if (!((hdr_field >> 4) & 1)) 2172 return len; 2173 2174 if (skb->protocol == htons(ETH_P_IP)) { 2175 if (ip_hdr(skb)->protocol == IPPROTO_TCP) 2176 hdr_len[2] = tcp_hdrlen(skb); 2177 else if (ip_hdr(skb)->protocol == IPPROTO_UDP) 2178 hdr_len[2] = sizeof(struct udphdr); 2179 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2180 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP) 2181 hdr_len[2] = tcp_hdrlen(skb); 2182 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP) 2183 hdr_len[2] = sizeof(struct udphdr); 2184 } 2185 2186 return len + hdr_len[2]; 2187 } 2188 2189 /** 2190 * create_hdr_descs - create header and header extension descriptors 2191 * @hdr_field: bitfield determining needed headers 2192 * @hdr_data: buffer containing header data 2193 * @len: length of data buffer 2194 * @hdr_len: array of individual header lengths 2195 * @scrq_arr: descriptor array 2196 * 2197 * Creates header and, if needed, header extension descriptors and 2198 * places them in a descriptor array, scrq_arr 2199 * 2200 * Return: Number of header descs 2201 */ 2202 2203 static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len, 2204 union sub_crq *scrq_arr) 2205 { 2206 union sub_crq *hdr_desc; 2207 int tmp_len = len; 2208 int num_descs = 0; 2209 u8 *data, *cur; 2210 int tmp; 2211 2212 while (tmp_len > 0) { 2213 cur = hdr_data + len - tmp_len; 2214 2215 hdr_desc = &scrq_arr[num_descs]; 2216 if (num_descs) { 2217 data = hdr_desc->hdr_ext.data; 2218 tmp = tmp_len > 29 ? 29 : tmp_len; 2219 hdr_desc->hdr_ext.first = IBMVNIC_CRQ_CMD; 2220 hdr_desc->hdr_ext.type = IBMVNIC_HDR_EXT_DESC; 2221 hdr_desc->hdr_ext.len = tmp; 2222 } else { 2223 data = hdr_desc->hdr.data; 2224 tmp = tmp_len > 24 ? 24 : tmp_len; 2225 hdr_desc->hdr.first = IBMVNIC_CRQ_CMD; 2226 hdr_desc->hdr.type = IBMVNIC_HDR_DESC; 2227 hdr_desc->hdr.len = tmp; 2228 hdr_desc->hdr.l2_len = (u8)hdr_len[0]; 2229 hdr_desc->hdr.l3_len = cpu_to_be16((u16)hdr_len[1]); 2230 hdr_desc->hdr.l4_len = (u8)hdr_len[2]; 2231 hdr_desc->hdr.flag = hdr_field << 1; 2232 } 2233 memcpy(data, cur, tmp); 2234 tmp_len -= tmp; 2235 num_descs++; 2236 } 2237 2238 return num_descs; 2239 } 2240 2241 /** 2242 * build_hdr_descs_arr - build a header descriptor array 2243 * @skb: tx socket buffer 2244 * @indir_arr: indirect array 2245 * @num_entries: number of descriptors to be sent 2246 * @hdr_field: bit field determining which headers will be sent 2247 * 2248 * This function will build a TX descriptor array with applicable 2249 * L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect. 2250 */ 2251 2252 static void build_hdr_descs_arr(struct sk_buff *skb, 2253 union sub_crq *indir_arr, 2254 int *num_entries, u8 hdr_field) 2255 { 2256 int hdr_len[3] = {0, 0, 0}; 2257 int tot_len; 2258 2259 tot_len = get_hdr_lens(hdr_field, skb, hdr_len); 2260 *num_entries += create_hdr_descs(hdr_field, skb_mac_header(skb), 2261 tot_len, hdr_len, indir_arr + 1); 2262 } 2263 2264 static int ibmvnic_xmit_workarounds(struct sk_buff *skb, 2265 struct net_device *netdev) 2266 { 2267 /* For some backing devices, mishandling of small packets 2268 * can result in a loss of connection or TX stall. Device 2269 * architects recommend that no packet should be smaller 2270 * than the minimum MTU value provided to the driver, so 2271 * pad any packets to that length 2272 */ 2273 if (skb->len < netdev->min_mtu) 2274 return skb_put_padto(skb, netdev->min_mtu); 2275 2276 return 0; 2277 } 2278 2279 static void ibmvnic_tx_scrq_clean_buffer(struct ibmvnic_adapter *adapter, 2280 struct ibmvnic_sub_crq_queue *tx_scrq) 2281 { 2282 struct ibmvnic_ind_xmit_queue *ind_bufp; 2283 struct ibmvnic_tx_buff *tx_buff; 2284 struct ibmvnic_tx_pool *tx_pool; 2285 union sub_crq tx_scrq_entry; 2286 int queue_num; 2287 int entries; 2288 int index; 2289 int i; 2290 2291 ind_bufp = &tx_scrq->ind_buf; 2292 entries = (u64)ind_bufp->index; 2293 queue_num = tx_scrq->pool_index; 2294 2295 for (i = entries - 1; i >= 0; --i) { 2296 tx_scrq_entry = ind_bufp->indir_arr[i]; 2297 if (tx_scrq_entry.v1.type != IBMVNIC_TX_DESC) 2298 continue; 2299 index = be32_to_cpu(tx_scrq_entry.v1.correlator); 2300 if (index & IBMVNIC_TSO_POOL_MASK) { 2301 tx_pool = &adapter->tso_pool[queue_num]; 2302 index &= ~IBMVNIC_TSO_POOL_MASK; 2303 } else { 2304 tx_pool = &adapter->tx_pool[queue_num]; 2305 } 2306 tx_pool->free_map[tx_pool->consumer_index] = index; 2307 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2308 tx_pool->num_buffers - 1 : 2309 tx_pool->consumer_index - 1; 2310 tx_buff = &tx_pool->tx_buff[index]; 2311 adapter->netdev->stats.tx_packets--; 2312 adapter->netdev->stats.tx_bytes -= tx_buff->skb->len; 2313 adapter->tx_stats_buffers[queue_num].batched_packets--; 2314 adapter->tx_stats_buffers[queue_num].bytes -= 2315 tx_buff->skb->len; 2316 dev_kfree_skb_any(tx_buff->skb); 2317 tx_buff->skb = NULL; 2318 adapter->netdev->stats.tx_dropped++; 2319 } 2320 2321 ind_bufp->index = 0; 2322 2323 if (atomic_sub_return(entries, &tx_scrq->used) <= 2324 (adapter->req_tx_entries_per_subcrq / 2) && 2325 __netif_subqueue_stopped(adapter->netdev, queue_num)) { 2326 rcu_read_lock(); 2327 2328 if (adapter->tx_queues_active) { 2329 netif_wake_subqueue(adapter->netdev, queue_num); 2330 netdev_dbg(adapter->netdev, "Started queue %d\n", 2331 queue_num); 2332 } 2333 2334 rcu_read_unlock(); 2335 } 2336 } 2337 2338 static int send_subcrq_direct(struct ibmvnic_adapter *adapter, 2339 u64 remote_handle, u64 *entry) 2340 { 2341 unsigned int ua = adapter->vdev->unit_address; 2342 struct device *dev = &adapter->vdev->dev; 2343 int rc; 2344 2345 /* Make sure the hypervisor sees the complete request */ 2346 dma_wmb(); 2347 rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua, 2348 cpu_to_be64(remote_handle), 2349 cpu_to_be64(entry[0]), cpu_to_be64(entry[1]), 2350 cpu_to_be64(entry[2]), cpu_to_be64(entry[3])); 2351 2352 if (rc) 2353 print_subcrq_error(dev, rc, __func__); 2354 2355 return rc; 2356 } 2357 2358 static int ibmvnic_tx_scrq_flush(struct ibmvnic_adapter *adapter, 2359 struct ibmvnic_sub_crq_queue *tx_scrq, 2360 bool indirect) 2361 { 2362 struct ibmvnic_ind_xmit_queue *ind_bufp; 2363 u64 dma_addr; 2364 u64 entries; 2365 u64 handle; 2366 int rc; 2367 2368 ind_bufp = &tx_scrq->ind_buf; 2369 dma_addr = (u64)ind_bufp->indir_dma; 2370 entries = (u64)ind_bufp->index; 2371 handle = tx_scrq->handle; 2372 2373 if (!entries) 2374 return 0; 2375 2376 if (indirect) 2377 rc = send_subcrq_indirect(adapter, handle, dma_addr, entries); 2378 else 2379 rc = send_subcrq_direct(adapter, handle, 2380 (u64 *)ind_bufp->indir_arr); 2381 2382 if (rc) 2383 ibmvnic_tx_scrq_clean_buffer(adapter, tx_scrq); 2384 else 2385 ind_bufp->index = 0; 2386 return rc; 2387 } 2388 2389 static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev) 2390 { 2391 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2392 int queue_num = skb_get_queue_mapping(skb); 2393 u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req; 2394 struct device *dev = &adapter->vdev->dev; 2395 struct ibmvnic_ind_xmit_queue *ind_bufp; 2396 struct ibmvnic_tx_buff *tx_buff = NULL; 2397 struct ibmvnic_sub_crq_queue *tx_scrq; 2398 struct ibmvnic_long_term_buff *ltb; 2399 struct ibmvnic_tx_pool *tx_pool; 2400 unsigned int tx_send_failed = 0; 2401 netdev_tx_t ret = NETDEV_TX_OK; 2402 unsigned int tx_map_failed = 0; 2403 union sub_crq indir_arr[16]; 2404 unsigned int tx_dropped = 0; 2405 unsigned int tx_dpackets = 0; 2406 unsigned int tx_bpackets = 0; 2407 unsigned int tx_bytes = 0; 2408 dma_addr_t data_dma_addr; 2409 struct netdev_queue *txq; 2410 unsigned long lpar_rc; 2411 union sub_crq tx_crq; 2412 unsigned int offset; 2413 bool use_scrq_send_direct = false; 2414 int num_entries = 1; 2415 unsigned char *dst; 2416 int bufidx = 0; 2417 u8 proto = 0; 2418 2419 /* If a reset is in progress, drop the packet since 2420 * the scrqs may get torn down. Otherwise use the 2421 * rcu to ensure reset waits for us to complete. 2422 */ 2423 rcu_read_lock(); 2424 if (!adapter->tx_queues_active) { 2425 dev_kfree_skb_any(skb); 2426 2427 tx_send_failed++; 2428 tx_dropped++; 2429 ret = NETDEV_TX_OK; 2430 goto out; 2431 } 2432 2433 tx_scrq = adapter->tx_scrq[queue_num]; 2434 txq = netdev_get_tx_queue(netdev, queue_num); 2435 ind_bufp = &tx_scrq->ind_buf; 2436 2437 if (ibmvnic_xmit_workarounds(skb, netdev)) { 2438 tx_dropped++; 2439 tx_send_failed++; 2440 ret = NETDEV_TX_OK; 2441 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2442 if (lpar_rc != H_SUCCESS) 2443 goto tx_err; 2444 goto out; 2445 } 2446 2447 if (skb_is_gso(skb)) 2448 tx_pool = &adapter->tso_pool[queue_num]; 2449 else 2450 tx_pool = &adapter->tx_pool[queue_num]; 2451 2452 bufidx = tx_pool->free_map[tx_pool->consumer_index]; 2453 2454 if (bufidx == IBMVNIC_INVALID_MAP) { 2455 dev_kfree_skb_any(skb); 2456 tx_send_failed++; 2457 tx_dropped++; 2458 ret = NETDEV_TX_OK; 2459 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2460 if (lpar_rc != H_SUCCESS) 2461 goto tx_err; 2462 goto out; 2463 } 2464 2465 tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP; 2466 2467 map_txpool_buf_to_ltb(tx_pool, bufidx, <b, &offset); 2468 2469 dst = ltb->buff + offset; 2470 memset(dst, 0, tx_pool->buf_size); 2471 data_dma_addr = ltb->addr + offset; 2472 2473 /* if we are going to send_subcrq_direct this then we need to 2474 * update the checksum before copying the data into ltb. Essentially 2475 * these packets force disable CSO so that we can guarantee that 2476 * FW does not need header info and we can send direct. Also, vnic 2477 * server must be able to xmit standard packets without header data 2478 */ 2479 if (*hdrs == 0 && !skb_is_gso(skb) && 2480 !ind_bufp->index && !netdev_xmit_more()) { 2481 use_scrq_send_direct = true; 2482 if (skb->ip_summed == CHECKSUM_PARTIAL && 2483 skb_checksum_help(skb)) 2484 use_scrq_send_direct = false; 2485 } 2486 2487 if (skb_shinfo(skb)->nr_frags) { 2488 int cur, i; 2489 2490 /* Copy the head */ 2491 skb_copy_from_linear_data(skb, dst, skb_headlen(skb)); 2492 cur = skb_headlen(skb); 2493 2494 /* Copy the frags */ 2495 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { 2496 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; 2497 2498 memcpy(dst + cur, skb_frag_address(frag), 2499 skb_frag_size(frag)); 2500 cur += skb_frag_size(frag); 2501 } 2502 } else { 2503 skb_copy_from_linear_data(skb, dst, skb->len); 2504 } 2505 2506 tx_pool->consumer_index = 2507 (tx_pool->consumer_index + 1) % tx_pool->num_buffers; 2508 2509 tx_buff = &tx_pool->tx_buff[bufidx]; 2510 2511 /* Sanity checks on our free map to make sure it points to an index 2512 * that is not being occupied by another skb. If skb memory is 2513 * not freed then we see congestion control kick in and halt tx. 2514 */ 2515 if (unlikely(tx_buff->skb)) { 2516 dev_warn_ratelimited(dev, "TX free map points to untracked skb (%s %d idx=%d)\n", 2517 skb_is_gso(skb) ? "tso_pool" : "tx_pool", 2518 queue_num, bufidx); 2519 dev_kfree_skb_any(tx_buff->skb); 2520 } 2521 2522 tx_buff->skb = skb; 2523 tx_buff->index = bufidx; 2524 tx_buff->pool_index = queue_num; 2525 2526 memset(&tx_crq, 0, sizeof(tx_crq)); 2527 tx_crq.v1.first = IBMVNIC_CRQ_CMD; 2528 tx_crq.v1.type = IBMVNIC_TX_DESC; 2529 tx_crq.v1.n_crq_elem = 1; 2530 tx_crq.v1.n_sge = 1; 2531 tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED; 2532 2533 if (skb_is_gso(skb)) 2534 tx_crq.v1.correlator = 2535 cpu_to_be32(bufidx | IBMVNIC_TSO_POOL_MASK); 2536 else 2537 tx_crq.v1.correlator = cpu_to_be32(bufidx); 2538 tx_crq.v1.dma_reg = cpu_to_be16(ltb->map_id); 2539 tx_crq.v1.sge_len = cpu_to_be32(skb->len); 2540 tx_crq.v1.ioba = cpu_to_be64(data_dma_addr); 2541 2542 if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) { 2543 tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT; 2544 tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci); 2545 } 2546 2547 if (skb->protocol == htons(ETH_P_IP)) { 2548 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4; 2549 proto = ip_hdr(skb)->protocol; 2550 } else if (skb->protocol == htons(ETH_P_IPV6)) { 2551 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6; 2552 proto = ipv6_hdr(skb)->nexthdr; 2553 } 2554 2555 if (proto == IPPROTO_TCP) 2556 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP; 2557 else if (proto == IPPROTO_UDP) 2558 tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP; 2559 2560 if (skb->ip_summed == CHECKSUM_PARTIAL) { 2561 tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD; 2562 hdrs += 2; 2563 } 2564 if (skb_is_gso(skb)) { 2565 tx_crq.v1.flags1 |= IBMVNIC_TX_LSO; 2566 tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size); 2567 hdrs += 2; 2568 } else if (use_scrq_send_direct) { 2569 /* See above comment, CSO disabled with direct xmit */ 2570 tx_crq.v1.flags1 &= ~(IBMVNIC_TX_CHKSUM_OFFLOAD); 2571 ind_bufp->index = 1; 2572 tx_buff->num_entries = 1; 2573 netdev_tx_sent_queue(txq, skb->len); 2574 ind_bufp->indir_arr[0] = tx_crq; 2575 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, false); 2576 if (lpar_rc != H_SUCCESS) 2577 goto tx_err; 2578 2579 tx_dpackets++; 2580 goto early_exit; 2581 } 2582 2583 if ((*hdrs >> 7) & 1) 2584 build_hdr_descs_arr(skb, indir_arr, &num_entries, *hdrs); 2585 2586 tx_crq.v1.n_crq_elem = num_entries; 2587 tx_buff->num_entries = num_entries; 2588 /* flush buffer if current entry can not fit */ 2589 if (num_entries + ind_bufp->index > IBMVNIC_MAX_IND_DESCS) { 2590 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2591 if (lpar_rc != H_SUCCESS) 2592 goto tx_flush_err; 2593 } 2594 2595 indir_arr[0] = tx_crq; 2596 memcpy(&ind_bufp->indir_arr[ind_bufp->index], &indir_arr[0], 2597 num_entries * sizeof(struct ibmvnic_generic_scrq)); 2598 2599 ind_bufp->index += num_entries; 2600 if (__netdev_tx_sent_queue(txq, skb->len, 2601 netdev_xmit_more() && 2602 ind_bufp->index < IBMVNIC_MAX_IND_DESCS)) { 2603 lpar_rc = ibmvnic_tx_scrq_flush(adapter, tx_scrq, true); 2604 if (lpar_rc != H_SUCCESS) 2605 goto tx_err; 2606 } 2607 2608 tx_bpackets++; 2609 2610 early_exit: 2611 if (atomic_add_return(num_entries, &tx_scrq->used) 2612 >= adapter->req_tx_entries_per_subcrq) { 2613 netdev_dbg(netdev, "Stopping queue %d\n", queue_num); 2614 netif_stop_subqueue(netdev, queue_num); 2615 } 2616 2617 tx_bytes += skb->len; 2618 txq_trans_cond_update(txq); 2619 ret = NETDEV_TX_OK; 2620 goto out; 2621 2622 tx_flush_err: 2623 dev_kfree_skb_any(skb); 2624 tx_buff->skb = NULL; 2625 tx_pool->consumer_index = tx_pool->consumer_index == 0 ? 2626 tx_pool->num_buffers - 1 : 2627 tx_pool->consumer_index - 1; 2628 tx_dropped++; 2629 tx_err: 2630 if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER) 2631 dev_err_ratelimited(dev, "tx: send failed\n"); 2632 2633 if (lpar_rc == H_CLOSED || adapter->failover_pending) { 2634 /* Disable TX and report carrier off if queue is closed 2635 * or pending failover. 2636 * Firmware guarantees that a signal will be sent to the 2637 * driver, triggering a reset or some other action. 2638 */ 2639 netif_tx_stop_all_queues(netdev); 2640 netif_carrier_off(netdev); 2641 } 2642 out: 2643 rcu_read_unlock(); 2644 netdev->stats.tx_dropped += tx_dropped; 2645 netdev->stats.tx_bytes += tx_bytes; 2646 netdev->stats.tx_packets += tx_bpackets + tx_dpackets; 2647 adapter->tx_send_failed += tx_send_failed; 2648 adapter->tx_map_failed += tx_map_failed; 2649 adapter->tx_stats_buffers[queue_num].batched_packets += tx_bpackets; 2650 adapter->tx_stats_buffers[queue_num].direct_packets += tx_dpackets; 2651 adapter->tx_stats_buffers[queue_num].bytes += tx_bytes; 2652 adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped; 2653 2654 return ret; 2655 } 2656 2657 static void ibmvnic_set_multi(struct net_device *netdev) 2658 { 2659 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2660 struct netdev_hw_addr *ha; 2661 union ibmvnic_crq crq; 2662 2663 memset(&crq, 0, sizeof(crq)); 2664 crq.request_capability.first = IBMVNIC_CRQ_CMD; 2665 crq.request_capability.cmd = REQUEST_CAPABILITY; 2666 2667 if (netdev->flags & IFF_PROMISC) { 2668 if (!adapter->promisc_supported) 2669 return; 2670 } else { 2671 if (netdev->flags & IFF_ALLMULTI) { 2672 /* Accept all multicast */ 2673 memset(&crq, 0, sizeof(crq)); 2674 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2675 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2676 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL; 2677 ibmvnic_send_crq(adapter, &crq); 2678 } else if (netdev_mc_empty(netdev)) { 2679 /* Reject all multicast */ 2680 memset(&crq, 0, sizeof(crq)); 2681 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2682 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2683 crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL; 2684 ibmvnic_send_crq(adapter, &crq); 2685 } else { 2686 /* Accept one or more multicast(s) */ 2687 netdev_for_each_mc_addr(ha, netdev) { 2688 memset(&crq, 0, sizeof(crq)); 2689 crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD; 2690 crq.multicast_ctrl.cmd = MULTICAST_CTRL; 2691 crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC; 2692 ether_addr_copy(&crq.multicast_ctrl.mac_addr[0], 2693 ha->addr); 2694 ibmvnic_send_crq(adapter, &crq); 2695 } 2696 } 2697 } 2698 } 2699 2700 static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr) 2701 { 2702 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2703 union ibmvnic_crq crq; 2704 int rc; 2705 2706 if (!is_valid_ether_addr(dev_addr)) { 2707 rc = -EADDRNOTAVAIL; 2708 goto err; 2709 } 2710 2711 memset(&crq, 0, sizeof(crq)); 2712 crq.change_mac_addr.first = IBMVNIC_CRQ_CMD; 2713 crq.change_mac_addr.cmd = CHANGE_MAC_ADDR; 2714 ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr); 2715 2716 mutex_lock(&adapter->fw_lock); 2717 adapter->fw_done_rc = 0; 2718 reinit_completion(&adapter->fw_done); 2719 2720 rc = ibmvnic_send_crq(adapter, &crq); 2721 if (rc) { 2722 rc = -EIO; 2723 mutex_unlock(&adapter->fw_lock); 2724 goto err; 2725 } 2726 2727 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 2728 /* netdev->dev_addr is changed in handle_change_mac_rsp function */ 2729 if (rc || adapter->fw_done_rc) { 2730 rc = -EIO; 2731 mutex_unlock(&adapter->fw_lock); 2732 goto err; 2733 } 2734 mutex_unlock(&adapter->fw_lock); 2735 return 0; 2736 err: 2737 ether_addr_copy(adapter->mac_addr, netdev->dev_addr); 2738 return rc; 2739 } 2740 2741 static int ibmvnic_set_mac(struct net_device *netdev, void *p) 2742 { 2743 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 2744 struct sockaddr *addr = p; 2745 int rc; 2746 2747 rc = 0; 2748 if (!is_valid_ether_addr(addr->sa_data)) 2749 return -EADDRNOTAVAIL; 2750 2751 ether_addr_copy(adapter->mac_addr, addr->sa_data); 2752 if (adapter->state != VNIC_PROBED) 2753 rc = __ibmvnic_set_mac(netdev, addr->sa_data); 2754 2755 return rc; 2756 } 2757 2758 static const char *reset_reason_to_string(enum ibmvnic_reset_reason reason) 2759 { 2760 switch (reason) { 2761 case VNIC_RESET_FAILOVER: 2762 return "FAILOVER"; 2763 case VNIC_RESET_MOBILITY: 2764 return "MOBILITY"; 2765 case VNIC_RESET_FATAL: 2766 return "FATAL"; 2767 case VNIC_RESET_NON_FATAL: 2768 return "NON_FATAL"; 2769 case VNIC_RESET_TIMEOUT: 2770 return "TIMEOUT"; 2771 case VNIC_RESET_CHANGE_PARAM: 2772 return "CHANGE_PARAM"; 2773 case VNIC_RESET_PASSIVE_INIT: 2774 return "PASSIVE_INIT"; 2775 } 2776 return "UNKNOWN"; 2777 } 2778 2779 /* 2780 * Initialize the init_done completion and return code values. We 2781 * can get a transport event just after registering the CRQ and the 2782 * tasklet will use this to communicate the transport event. To ensure 2783 * we don't miss the notification/error, initialize these _before_ 2784 * regisering the CRQ. 2785 */ 2786 static inline void reinit_init_done(struct ibmvnic_adapter *adapter) 2787 { 2788 reinit_completion(&adapter->init_done); 2789 adapter->init_done_rc = 0; 2790 } 2791 2792 /* 2793 * do_reset returns zero if we are able to keep processing reset events, or 2794 * non-zero if we hit a fatal error and must halt. 2795 */ 2796 static int do_reset(struct ibmvnic_adapter *adapter, 2797 struct ibmvnic_rwi *rwi, u32 reset_state) 2798 { 2799 struct net_device *netdev = adapter->netdev; 2800 u64 old_num_rx_queues, old_num_tx_queues; 2801 u64 old_num_rx_slots, old_num_tx_slots; 2802 int rc; 2803 2804 netdev_dbg(adapter->netdev, 2805 "[S:%s FOP:%d] Reset reason: %s, reset_state: %s\n", 2806 adapter_state_to_string(adapter->state), 2807 adapter->failover_pending, 2808 reset_reason_to_string(rwi->reset_reason), 2809 adapter_state_to_string(reset_state)); 2810 2811 adapter->reset_reason = rwi->reset_reason; 2812 /* requestor of VNIC_RESET_CHANGE_PARAM already has the rtnl lock */ 2813 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 2814 rtnl_lock(); 2815 2816 /* Now that we have the rtnl lock, clear any pending failover. 2817 * This will ensure ibmvnic_open() has either completed or will 2818 * block until failover is complete. 2819 */ 2820 if (rwi->reset_reason == VNIC_RESET_FAILOVER) 2821 adapter->failover_pending = false; 2822 2823 /* read the state and check (again) after getting rtnl */ 2824 reset_state = adapter->state; 2825 2826 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 2827 rc = -EBUSY; 2828 goto out; 2829 } 2830 2831 netif_carrier_off(netdev); 2832 2833 old_num_rx_queues = adapter->req_rx_queues; 2834 old_num_tx_queues = adapter->req_tx_queues; 2835 old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq; 2836 old_num_tx_slots = adapter->req_tx_entries_per_subcrq; 2837 2838 ibmvnic_cleanup(netdev); 2839 2840 if (reset_state == VNIC_OPEN && 2841 adapter->reset_reason != VNIC_RESET_MOBILITY && 2842 adapter->reset_reason != VNIC_RESET_FAILOVER) { 2843 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2844 rc = __ibmvnic_close(netdev); 2845 if (rc) 2846 goto out; 2847 } else { 2848 adapter->state = VNIC_CLOSING; 2849 2850 /* Release the RTNL lock before link state change and 2851 * re-acquire after the link state change to allow 2852 * linkwatch_event to grab the RTNL lock and run during 2853 * a reset. 2854 */ 2855 rtnl_unlock(); 2856 rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN); 2857 rtnl_lock(); 2858 if (rc) 2859 goto out; 2860 2861 if (adapter->state == VNIC_OPEN) { 2862 /* When we dropped rtnl, ibmvnic_open() got 2863 * it and noticed that we are resetting and 2864 * set the adapter state to OPEN. Update our 2865 * new "target" state, and resume the reset 2866 * from VNIC_CLOSING state. 2867 */ 2868 netdev_dbg(netdev, 2869 "Open changed state from %s, updating.\n", 2870 adapter_state_to_string(reset_state)); 2871 reset_state = VNIC_OPEN; 2872 adapter->state = VNIC_CLOSING; 2873 } 2874 2875 if (adapter->state != VNIC_CLOSING) { 2876 /* If someone else changed the adapter state 2877 * when we dropped the rtnl, fail the reset 2878 */ 2879 rc = -EAGAIN; 2880 goto out; 2881 } 2882 adapter->state = VNIC_CLOSED; 2883 } 2884 } 2885 2886 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2887 release_resources(adapter); 2888 release_sub_crqs(adapter, 1); 2889 release_crq_queue(adapter); 2890 } 2891 2892 if (adapter->reset_reason != VNIC_RESET_NON_FATAL) { 2893 /* remove the closed state so when we call open it appears 2894 * we are coming from the probed state. 2895 */ 2896 adapter->state = VNIC_PROBED; 2897 2898 reinit_init_done(adapter); 2899 2900 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2901 rc = init_crq_queue(adapter); 2902 } else if (adapter->reset_reason == VNIC_RESET_MOBILITY) { 2903 rc = ibmvnic_reenable_crq_queue(adapter); 2904 release_sub_crqs(adapter, 1); 2905 } else { 2906 rc = ibmvnic_reset_crq(adapter); 2907 if (rc == H_CLOSED || rc == H_SUCCESS) { 2908 rc = vio_enable_interrupts(adapter->vdev); 2909 if (rc) 2910 netdev_err(adapter->netdev, 2911 "Reset failed to enable interrupts. rc=%d\n", 2912 rc); 2913 } 2914 } 2915 2916 if (rc) { 2917 netdev_err(adapter->netdev, 2918 "Reset couldn't initialize crq. rc=%d\n", rc); 2919 goto out; 2920 } 2921 2922 rc = ibmvnic_reset_init(adapter, true); 2923 if (rc) 2924 goto out; 2925 2926 /* If the adapter was in PROBE or DOWN state prior to the reset, 2927 * exit here. 2928 */ 2929 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) { 2930 rc = 0; 2931 goto out; 2932 } 2933 2934 rc = ibmvnic_login(netdev); 2935 if (rc) 2936 goto out; 2937 2938 if (adapter->reset_reason == VNIC_RESET_CHANGE_PARAM) { 2939 rc = init_resources(adapter); 2940 if (rc) 2941 goto out; 2942 } else if (adapter->req_rx_queues != old_num_rx_queues || 2943 adapter->req_tx_queues != old_num_tx_queues || 2944 adapter->req_rx_add_entries_per_subcrq != 2945 old_num_rx_slots || 2946 adapter->req_tx_entries_per_subcrq != 2947 old_num_tx_slots || 2948 !adapter->rx_pool || 2949 !adapter->tso_pool || 2950 !adapter->tx_pool) { 2951 release_napi(adapter); 2952 release_vpd_data(adapter); 2953 2954 rc = init_resources(adapter); 2955 if (rc) 2956 goto out; 2957 2958 } else { 2959 rc = init_tx_pools(netdev); 2960 if (rc) { 2961 netdev_dbg(netdev, 2962 "init tx pools failed (%d)\n", 2963 rc); 2964 goto out; 2965 } 2966 2967 rc = init_rx_pools(netdev); 2968 if (rc) { 2969 netdev_dbg(netdev, 2970 "init rx pools failed (%d)\n", 2971 rc); 2972 goto out; 2973 } 2974 } 2975 ibmvnic_disable_irqs(adapter); 2976 } 2977 adapter->state = VNIC_CLOSED; 2978 2979 if (reset_state == VNIC_CLOSED) { 2980 rc = 0; 2981 goto out; 2982 } 2983 2984 rc = __ibmvnic_open(netdev); 2985 if (rc) { 2986 rc = IBMVNIC_OPEN_FAILED; 2987 goto out; 2988 } 2989 2990 /* refresh device's multicast list */ 2991 ibmvnic_set_multi(netdev); 2992 2993 if (adapter->reset_reason == VNIC_RESET_FAILOVER || 2994 adapter->reset_reason == VNIC_RESET_MOBILITY) 2995 __netdev_notify_peers(netdev); 2996 2997 rc = 0; 2998 2999 out: 3000 /* restore the adapter state if reset failed */ 3001 if (rc) 3002 adapter->state = reset_state; 3003 /* requestor of VNIC_RESET_CHANGE_PARAM should still hold the rtnl lock */ 3004 if (!(adapter->reset_reason == VNIC_RESET_CHANGE_PARAM)) 3005 rtnl_unlock(); 3006 3007 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Reset done, rc %d\n", 3008 adapter_state_to_string(adapter->state), 3009 adapter->failover_pending, rc); 3010 return rc; 3011 } 3012 3013 static int do_hard_reset(struct ibmvnic_adapter *adapter, 3014 struct ibmvnic_rwi *rwi, u32 reset_state) 3015 { 3016 struct net_device *netdev = adapter->netdev; 3017 int rc; 3018 3019 netdev_dbg(adapter->netdev, "Hard resetting driver (%s)\n", 3020 reset_reason_to_string(rwi->reset_reason)); 3021 3022 /* read the state and check (again) after getting rtnl */ 3023 reset_state = adapter->state; 3024 3025 if (reset_state == VNIC_REMOVING || reset_state == VNIC_REMOVED) { 3026 rc = -EBUSY; 3027 goto out; 3028 } 3029 3030 netif_carrier_off(netdev); 3031 adapter->reset_reason = rwi->reset_reason; 3032 3033 ibmvnic_cleanup(netdev); 3034 release_resources(adapter); 3035 release_sub_crqs(adapter, 0); 3036 release_crq_queue(adapter); 3037 3038 /* remove the closed state so when we call open it appears 3039 * we are coming from the probed state. 3040 */ 3041 adapter->state = VNIC_PROBED; 3042 3043 reinit_init_done(adapter); 3044 3045 rc = init_crq_queue(adapter); 3046 if (rc) { 3047 netdev_err(adapter->netdev, 3048 "Couldn't initialize crq. rc=%d\n", rc); 3049 goto out; 3050 } 3051 3052 rc = ibmvnic_reset_init(adapter, false); 3053 if (rc) 3054 goto out; 3055 3056 /* If the adapter was in PROBE or DOWN state prior to the reset, 3057 * exit here. 3058 */ 3059 if (reset_state == VNIC_PROBED || reset_state == VNIC_DOWN) 3060 goto out; 3061 3062 rc = ibmvnic_login(netdev); 3063 if (rc) 3064 goto out; 3065 3066 rc = init_resources(adapter); 3067 if (rc) 3068 goto out; 3069 3070 ibmvnic_disable_irqs(adapter); 3071 adapter->state = VNIC_CLOSED; 3072 3073 if (reset_state == VNIC_CLOSED) 3074 goto out; 3075 3076 rc = __ibmvnic_open(netdev); 3077 if (rc) { 3078 rc = IBMVNIC_OPEN_FAILED; 3079 goto out; 3080 } 3081 3082 __netdev_notify_peers(netdev); 3083 out: 3084 /* restore adapter state if reset failed */ 3085 if (rc) 3086 adapter->state = reset_state; 3087 netdev_dbg(adapter->netdev, "[S:%s FOP:%d] Hard reset done, rc %d\n", 3088 adapter_state_to_string(adapter->state), 3089 adapter->failover_pending, rc); 3090 return rc; 3091 } 3092 3093 static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter) 3094 { 3095 struct ibmvnic_rwi *rwi; 3096 unsigned long flags; 3097 3098 spin_lock_irqsave(&adapter->rwi_lock, flags); 3099 3100 if (!list_empty(&adapter->rwi_list)) { 3101 rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi, 3102 list); 3103 list_del(&rwi->list); 3104 } else { 3105 rwi = NULL; 3106 } 3107 3108 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 3109 return rwi; 3110 } 3111 3112 /** 3113 * do_passive_init - complete probing when partner device is detected. 3114 * @adapter: ibmvnic_adapter struct 3115 * 3116 * If the ibmvnic device does not have a partner device to communicate with at boot 3117 * and that partner device comes online at a later time, this function is called 3118 * to complete the initialization process of ibmvnic device. 3119 * Caller is expected to hold rtnl_lock(). 3120 * 3121 * Returns non-zero if sub-CRQs are not initialized properly leaving the device 3122 * in the down state. 3123 * Returns 0 upon success and the device is in PROBED state. 3124 */ 3125 3126 static int do_passive_init(struct ibmvnic_adapter *adapter) 3127 { 3128 unsigned long timeout = msecs_to_jiffies(30000); 3129 struct net_device *netdev = adapter->netdev; 3130 struct device *dev = &adapter->vdev->dev; 3131 int rc; 3132 3133 netdev_dbg(netdev, "Partner device found, probing.\n"); 3134 3135 adapter->state = VNIC_PROBING; 3136 reinit_completion(&adapter->init_done); 3137 adapter->init_done_rc = 0; 3138 adapter->crq.active = true; 3139 3140 rc = send_crq_init_complete(adapter); 3141 if (rc) 3142 goto out; 3143 3144 rc = send_version_xchg(adapter); 3145 if (rc) 3146 netdev_dbg(adapter->netdev, "send_version_xchg failed, rc=%d\n", rc); 3147 3148 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 3149 dev_err(dev, "Initialization sequence timed out\n"); 3150 rc = -ETIMEDOUT; 3151 goto out; 3152 } 3153 3154 rc = init_sub_crqs(adapter); 3155 if (rc) { 3156 dev_err(dev, "Initialization of sub crqs failed, rc=%d\n", rc); 3157 goto out; 3158 } 3159 3160 rc = init_sub_crq_irqs(adapter); 3161 if (rc) { 3162 dev_err(dev, "Failed to initialize sub crq irqs\n, rc=%d", rc); 3163 goto init_failed; 3164 } 3165 3166 netdev->mtu = adapter->req_mtu - ETH_HLEN; 3167 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 3168 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 3169 3170 adapter->state = VNIC_PROBED; 3171 netdev_dbg(netdev, "Probed successfully. Waiting for signal from partner device.\n"); 3172 3173 return 0; 3174 3175 init_failed: 3176 release_sub_crqs(adapter, 1); 3177 out: 3178 adapter->state = VNIC_DOWN; 3179 return rc; 3180 } 3181 3182 static void __ibmvnic_reset(struct work_struct *work) 3183 { 3184 struct ibmvnic_adapter *adapter; 3185 unsigned int timeout = 5000; 3186 struct ibmvnic_rwi *tmprwi; 3187 bool saved_state = false; 3188 struct ibmvnic_rwi *rwi; 3189 unsigned long flags; 3190 struct device *dev; 3191 bool need_reset; 3192 int num_fails = 0; 3193 u32 reset_state; 3194 int rc = 0; 3195 3196 adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset); 3197 dev = &adapter->vdev->dev; 3198 3199 /* Wait for ibmvnic_probe() to complete. If probe is taking too long 3200 * or if another reset is in progress, defer work for now. If probe 3201 * eventually fails it will flush and terminate our work. 3202 * 3203 * Three possibilities here: 3204 * 1. Adpater being removed - just return 3205 * 2. Timed out on probe or another reset in progress - delay the work 3206 * 3. Completed probe - perform any resets in queue 3207 */ 3208 if (adapter->state == VNIC_PROBING && 3209 !wait_for_completion_timeout(&adapter->probe_done, timeout)) { 3210 dev_err(dev, "Reset thread timed out on probe"); 3211 queue_delayed_work(system_long_wq, 3212 &adapter->ibmvnic_delayed_reset, 3213 IBMVNIC_RESET_DELAY); 3214 return; 3215 } 3216 3217 /* adapter is done with probe (i.e state is never VNIC_PROBING now) */ 3218 if (adapter->state == VNIC_REMOVING) 3219 return; 3220 3221 /* ->rwi_list is stable now (no one else is removing entries) */ 3222 3223 /* ibmvnic_probe() may have purged the reset queue after we were 3224 * scheduled to process a reset so there maybe no resets to process. 3225 * Before setting the ->resetting bit though, we have to make sure 3226 * that there is infact a reset to process. Otherwise we may race 3227 * with ibmvnic_open() and end up leaving the vnic down: 3228 * 3229 * __ibmvnic_reset() ibmvnic_open() 3230 * ----------------- -------------- 3231 * 3232 * set ->resetting bit 3233 * find ->resetting bit is set 3234 * set ->state to IBMVNIC_OPEN (i.e 3235 * assume reset will open device) 3236 * return 3237 * find reset queue empty 3238 * return 3239 * 3240 * Neither performed vnic login/open and vnic stays down 3241 * 3242 * If we hold the lock and conditionally set the bit, either we 3243 * or ibmvnic_open() will complete the open. 3244 */ 3245 need_reset = false; 3246 spin_lock(&adapter->rwi_lock); 3247 if (!list_empty(&adapter->rwi_list)) { 3248 if (test_and_set_bit_lock(0, &adapter->resetting)) { 3249 queue_delayed_work(system_long_wq, 3250 &adapter->ibmvnic_delayed_reset, 3251 IBMVNIC_RESET_DELAY); 3252 } else { 3253 need_reset = true; 3254 } 3255 } 3256 spin_unlock(&adapter->rwi_lock); 3257 3258 if (!need_reset) 3259 return; 3260 3261 rwi = get_next_rwi(adapter); 3262 while (rwi) { 3263 spin_lock_irqsave(&adapter->state_lock, flags); 3264 3265 if (adapter->state == VNIC_REMOVING || 3266 adapter->state == VNIC_REMOVED) { 3267 spin_unlock_irqrestore(&adapter->state_lock, flags); 3268 kfree(rwi); 3269 rc = EBUSY; 3270 break; 3271 } 3272 3273 if (!saved_state) { 3274 reset_state = adapter->state; 3275 saved_state = true; 3276 } 3277 spin_unlock_irqrestore(&adapter->state_lock, flags); 3278 3279 if (rwi->reset_reason == VNIC_RESET_PASSIVE_INIT) { 3280 rtnl_lock(); 3281 rc = do_passive_init(adapter); 3282 rtnl_unlock(); 3283 if (!rc) 3284 netif_carrier_on(adapter->netdev); 3285 } else if (adapter->force_reset_recovery) { 3286 /* Since we are doing a hard reset now, clear the 3287 * failover_pending flag so we don't ignore any 3288 * future MOBILITY or other resets. 3289 */ 3290 adapter->failover_pending = false; 3291 3292 /* Transport event occurred during previous reset */ 3293 if (adapter->wait_for_reset) { 3294 /* Previous was CHANGE_PARAM; caller locked */ 3295 adapter->force_reset_recovery = false; 3296 rc = do_hard_reset(adapter, rwi, reset_state); 3297 } else { 3298 rtnl_lock(); 3299 adapter->force_reset_recovery = false; 3300 rc = do_hard_reset(adapter, rwi, reset_state); 3301 rtnl_unlock(); 3302 } 3303 if (rc) 3304 num_fails++; 3305 else 3306 num_fails = 0; 3307 3308 /* If auto-priority-failover is enabled we can get 3309 * back to back failovers during resets, resulting 3310 * in at least two failed resets (from high-priority 3311 * backing device to low-priority one and then back) 3312 * If resets continue to fail beyond that, give the 3313 * adapter some time to settle down before retrying. 3314 */ 3315 if (num_fails >= 3) { 3316 netdev_dbg(adapter->netdev, 3317 "[S:%s] Hard reset failed %d times, waiting 60 secs\n", 3318 adapter_state_to_string(adapter->state), 3319 num_fails); 3320 set_current_state(TASK_UNINTERRUPTIBLE); 3321 schedule_timeout(60 * HZ); 3322 } 3323 } else { 3324 rc = do_reset(adapter, rwi, reset_state); 3325 } 3326 tmprwi = rwi; 3327 adapter->last_reset_time = jiffies; 3328 3329 if (rc) 3330 netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc); 3331 3332 rwi = get_next_rwi(adapter); 3333 3334 /* 3335 * If there are no resets queued and the previous reset failed, 3336 * the adapter would be in an undefined state. So retry the 3337 * previous reset as a hard reset. 3338 * 3339 * Else, free the previous rwi and, if there is another reset 3340 * queued, process the new reset even if previous reset failed 3341 * (the previous reset could have failed because of a fail 3342 * over for instance, so process the fail over). 3343 */ 3344 if (!rwi && rc) 3345 rwi = tmprwi; 3346 else 3347 kfree(tmprwi); 3348 3349 if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER || 3350 rwi->reset_reason == VNIC_RESET_MOBILITY || rc)) 3351 adapter->force_reset_recovery = true; 3352 } 3353 3354 if (adapter->wait_for_reset) { 3355 adapter->reset_done_rc = rc; 3356 complete(&adapter->reset_done); 3357 } 3358 3359 clear_bit_unlock(0, &adapter->resetting); 3360 3361 netdev_dbg(adapter->netdev, 3362 "[S:%s FRR:%d WFR:%d] Done processing resets\n", 3363 adapter_state_to_string(adapter->state), 3364 adapter->force_reset_recovery, 3365 adapter->wait_for_reset); 3366 } 3367 3368 static void __ibmvnic_delayed_reset(struct work_struct *work) 3369 { 3370 struct ibmvnic_adapter *adapter; 3371 3372 adapter = container_of(work, struct ibmvnic_adapter, 3373 ibmvnic_delayed_reset.work); 3374 __ibmvnic_reset(&adapter->ibmvnic_reset); 3375 } 3376 3377 static void flush_reset_queue(struct ibmvnic_adapter *adapter) 3378 { 3379 struct list_head *entry, *tmp_entry; 3380 3381 if (!list_empty(&adapter->rwi_list)) { 3382 list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) { 3383 list_del(entry); 3384 kfree(list_entry(entry, struct ibmvnic_rwi, list)); 3385 } 3386 } 3387 } 3388 3389 static int ibmvnic_reset(struct ibmvnic_adapter *adapter, 3390 enum ibmvnic_reset_reason reason) 3391 { 3392 struct net_device *netdev = adapter->netdev; 3393 struct ibmvnic_rwi *rwi, *tmp; 3394 unsigned long flags; 3395 int ret; 3396 3397 spin_lock_irqsave(&adapter->rwi_lock, flags); 3398 3399 /* If failover is pending don't schedule any other reset. 3400 * Instead let the failover complete. If there is already a 3401 * a failover reset scheduled, we will detect and drop the 3402 * duplicate reset when walking the ->rwi_list below. 3403 */ 3404 if (adapter->state == VNIC_REMOVING || 3405 adapter->state == VNIC_REMOVED || 3406 (adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) { 3407 ret = EBUSY; 3408 netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n"); 3409 goto err; 3410 } 3411 3412 list_for_each_entry(tmp, &adapter->rwi_list, list) { 3413 if (tmp->reset_reason == reason) { 3414 netdev_dbg(netdev, "Skipping matching reset, reason=%s\n", 3415 reset_reason_to_string(reason)); 3416 ret = EBUSY; 3417 goto err; 3418 } 3419 } 3420 3421 rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC); 3422 if (!rwi) { 3423 ret = ENOMEM; 3424 goto err; 3425 } 3426 /* if we just received a transport event, 3427 * flush reset queue and process this reset 3428 */ 3429 if (adapter->force_reset_recovery) 3430 flush_reset_queue(adapter); 3431 3432 rwi->reset_reason = reason; 3433 list_add_tail(&rwi->list, &adapter->rwi_list); 3434 netdev_dbg(adapter->netdev, "Scheduling reset (reason %s)\n", 3435 reset_reason_to_string(reason)); 3436 queue_work(system_long_wq, &adapter->ibmvnic_reset); 3437 3438 ret = 0; 3439 err: 3440 /* ibmvnic_close() below can block, so drop the lock first */ 3441 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 3442 3443 if (ret == ENOMEM) 3444 ibmvnic_close(netdev); 3445 3446 return -ret; 3447 } 3448 3449 static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue) 3450 { 3451 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3452 3453 if (test_bit(0, &adapter->resetting)) { 3454 netdev_err(adapter->netdev, 3455 "Adapter is resetting, skip timeout reset\n"); 3456 return; 3457 } 3458 /* No queuing up reset until at least 5 seconds (default watchdog val) 3459 * after last reset 3460 */ 3461 if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) { 3462 netdev_dbg(dev, "Not yet time to tx timeout.\n"); 3463 return; 3464 } 3465 ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT); 3466 } 3467 3468 static void remove_buff_from_pool(struct ibmvnic_adapter *adapter, 3469 struct ibmvnic_rx_buff *rx_buff) 3470 { 3471 struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index]; 3472 3473 rx_buff->skb = NULL; 3474 3475 pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff); 3476 pool->next_alloc = (pool->next_alloc + 1) % pool->size; 3477 3478 atomic_dec(&pool->available); 3479 } 3480 3481 static int ibmvnic_poll(struct napi_struct *napi, int budget) 3482 { 3483 struct ibmvnic_sub_crq_queue *rx_scrq; 3484 struct ibmvnic_adapter *adapter; 3485 struct net_device *netdev; 3486 int frames_processed; 3487 int scrq_num; 3488 3489 netdev = napi->dev; 3490 adapter = netdev_priv(netdev); 3491 scrq_num = (int)(napi - adapter->napi); 3492 frames_processed = 0; 3493 rx_scrq = adapter->rx_scrq[scrq_num]; 3494 3495 restart_poll: 3496 while (frames_processed < budget) { 3497 struct sk_buff *skb; 3498 struct ibmvnic_rx_buff *rx_buff; 3499 union sub_crq *next; 3500 u32 length; 3501 u16 offset; 3502 u8 flags = 0; 3503 3504 if (unlikely(test_bit(0, &adapter->resetting) && 3505 adapter->reset_reason != VNIC_RESET_NON_FATAL)) { 3506 enable_scrq_irq(adapter, rx_scrq); 3507 napi_complete_done(napi, frames_processed); 3508 return frames_processed; 3509 } 3510 3511 if (!pending_scrq(adapter, rx_scrq)) 3512 break; 3513 next = ibmvnic_next_scrq(adapter, rx_scrq); 3514 rx_buff = (struct ibmvnic_rx_buff *) 3515 be64_to_cpu(next->rx_comp.correlator); 3516 /* do error checking */ 3517 if (next->rx_comp.rc) { 3518 netdev_dbg(netdev, "rx buffer returned with rc %x\n", 3519 be16_to_cpu(next->rx_comp.rc)); 3520 /* free the entry */ 3521 next->rx_comp.first = 0; 3522 dev_kfree_skb_any(rx_buff->skb); 3523 remove_buff_from_pool(adapter, rx_buff); 3524 continue; 3525 } else if (!rx_buff->skb) { 3526 /* free the entry */ 3527 next->rx_comp.first = 0; 3528 remove_buff_from_pool(adapter, rx_buff); 3529 continue; 3530 } 3531 3532 length = be32_to_cpu(next->rx_comp.len); 3533 offset = be16_to_cpu(next->rx_comp.off_frame_data); 3534 flags = next->rx_comp.flags; 3535 skb = rx_buff->skb; 3536 /* load long_term_buff before copying to skb */ 3537 dma_rmb(); 3538 skb_copy_to_linear_data(skb, rx_buff->data + offset, 3539 length); 3540 3541 /* VLAN Header has been stripped by the system firmware and 3542 * needs to be inserted by the driver 3543 */ 3544 if (adapter->rx_vlan_header_insertion && 3545 (flags & IBMVNIC_VLAN_STRIPPED)) 3546 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), 3547 ntohs(next->rx_comp.vlan_tci)); 3548 3549 /* free the entry */ 3550 next->rx_comp.first = 0; 3551 remove_buff_from_pool(adapter, rx_buff); 3552 3553 skb_put(skb, length); 3554 skb->protocol = eth_type_trans(skb, netdev); 3555 skb_record_rx_queue(skb, scrq_num); 3556 3557 if (flags & IBMVNIC_IP_CHKSUM_GOOD && 3558 flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) { 3559 skb->ip_summed = CHECKSUM_UNNECESSARY; 3560 } 3561 3562 length = skb->len; 3563 napi_gro_receive(napi, skb); /* send it up */ 3564 netdev->stats.rx_packets++; 3565 netdev->stats.rx_bytes += length; 3566 adapter->rx_stats_buffers[scrq_num].packets++; 3567 adapter->rx_stats_buffers[scrq_num].bytes += length; 3568 frames_processed++; 3569 } 3570 3571 if (adapter->state != VNIC_CLOSING && 3572 (atomic_read(&adapter->rx_pool[scrq_num].available) < 3573 adapter->req_rx_add_entries_per_subcrq / 2)) 3574 replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]); 3575 if (frames_processed < budget) { 3576 if (napi_complete_done(napi, frames_processed)) { 3577 enable_scrq_irq(adapter, rx_scrq); 3578 if (pending_scrq(adapter, rx_scrq)) { 3579 if (napi_schedule(napi)) { 3580 disable_scrq_irq(adapter, rx_scrq); 3581 goto restart_poll; 3582 } 3583 } 3584 } 3585 } 3586 return frames_processed; 3587 } 3588 3589 static int wait_for_reset(struct ibmvnic_adapter *adapter) 3590 { 3591 int rc, ret; 3592 3593 adapter->fallback.mtu = adapter->req_mtu; 3594 adapter->fallback.rx_queues = adapter->req_rx_queues; 3595 adapter->fallback.tx_queues = adapter->req_tx_queues; 3596 adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq; 3597 adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq; 3598 3599 reinit_completion(&adapter->reset_done); 3600 adapter->wait_for_reset = true; 3601 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3602 3603 if (rc) { 3604 ret = rc; 3605 goto out; 3606 } 3607 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000); 3608 if (rc) { 3609 ret = -ENODEV; 3610 goto out; 3611 } 3612 3613 ret = 0; 3614 if (adapter->reset_done_rc) { 3615 ret = -EIO; 3616 adapter->desired.mtu = adapter->fallback.mtu; 3617 adapter->desired.rx_queues = adapter->fallback.rx_queues; 3618 adapter->desired.tx_queues = adapter->fallback.tx_queues; 3619 adapter->desired.rx_entries = adapter->fallback.rx_entries; 3620 adapter->desired.tx_entries = adapter->fallback.tx_entries; 3621 3622 reinit_completion(&adapter->reset_done); 3623 adapter->wait_for_reset = true; 3624 rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM); 3625 if (rc) { 3626 ret = rc; 3627 goto out; 3628 } 3629 rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 3630 60000); 3631 if (rc) { 3632 ret = -ENODEV; 3633 goto out; 3634 } 3635 } 3636 out: 3637 adapter->wait_for_reset = false; 3638 3639 return ret; 3640 } 3641 3642 static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu) 3643 { 3644 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3645 3646 adapter->desired.mtu = new_mtu + ETH_HLEN; 3647 3648 return wait_for_reset(adapter); 3649 } 3650 3651 static netdev_features_t ibmvnic_features_check(struct sk_buff *skb, 3652 struct net_device *dev, 3653 netdev_features_t features) 3654 { 3655 /* Some backing hardware adapters can not 3656 * handle packets with a MSS less than 224 3657 * or with only one segment. 3658 */ 3659 if (skb_is_gso(skb)) { 3660 if (skb_shinfo(skb)->gso_size < 224 || 3661 skb_shinfo(skb)->gso_segs == 1) 3662 features &= ~NETIF_F_GSO_MASK; 3663 } 3664 3665 return features; 3666 } 3667 3668 static const struct net_device_ops ibmvnic_netdev_ops = { 3669 .ndo_open = ibmvnic_open, 3670 .ndo_stop = ibmvnic_close, 3671 .ndo_start_xmit = ibmvnic_xmit, 3672 .ndo_set_rx_mode = ibmvnic_set_multi, 3673 .ndo_set_mac_address = ibmvnic_set_mac, 3674 .ndo_validate_addr = eth_validate_addr, 3675 .ndo_tx_timeout = ibmvnic_tx_timeout, 3676 .ndo_change_mtu = ibmvnic_change_mtu, 3677 .ndo_features_check = ibmvnic_features_check, 3678 }; 3679 3680 /* ethtool functions */ 3681 3682 static int ibmvnic_get_link_ksettings(struct net_device *netdev, 3683 struct ethtool_link_ksettings *cmd) 3684 { 3685 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3686 int rc; 3687 3688 rc = send_query_phys_parms(adapter); 3689 if (rc) { 3690 adapter->speed = SPEED_UNKNOWN; 3691 adapter->duplex = DUPLEX_UNKNOWN; 3692 } 3693 cmd->base.speed = adapter->speed; 3694 cmd->base.duplex = adapter->duplex; 3695 cmd->base.port = PORT_FIBRE; 3696 cmd->base.phy_address = 0; 3697 cmd->base.autoneg = AUTONEG_ENABLE; 3698 3699 return 0; 3700 } 3701 3702 static void ibmvnic_get_drvinfo(struct net_device *netdev, 3703 struct ethtool_drvinfo *info) 3704 { 3705 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3706 3707 strscpy(info->driver, ibmvnic_driver_name, sizeof(info->driver)); 3708 strscpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version)); 3709 strscpy(info->fw_version, adapter->fw_version, 3710 sizeof(info->fw_version)); 3711 } 3712 3713 static u32 ibmvnic_get_msglevel(struct net_device *netdev) 3714 { 3715 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3716 3717 return adapter->msg_enable; 3718 } 3719 3720 static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data) 3721 { 3722 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3723 3724 adapter->msg_enable = data; 3725 } 3726 3727 static u32 ibmvnic_get_link(struct net_device *netdev) 3728 { 3729 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3730 3731 /* Don't need to send a query because we request a logical link up at 3732 * init and then we wait for link state indications 3733 */ 3734 return adapter->logical_link_state; 3735 } 3736 3737 static void ibmvnic_get_ringparam(struct net_device *netdev, 3738 struct ethtool_ringparam *ring, 3739 struct kernel_ethtool_ringparam *kernel_ring, 3740 struct netlink_ext_ack *extack) 3741 { 3742 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3743 3744 ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq; 3745 ring->tx_max_pending = adapter->max_tx_entries_per_subcrq; 3746 ring->rx_mini_max_pending = 0; 3747 ring->rx_jumbo_max_pending = 0; 3748 ring->rx_pending = adapter->req_rx_add_entries_per_subcrq; 3749 ring->tx_pending = adapter->req_tx_entries_per_subcrq; 3750 ring->rx_mini_pending = 0; 3751 ring->rx_jumbo_pending = 0; 3752 } 3753 3754 static int ibmvnic_set_ringparam(struct net_device *netdev, 3755 struct ethtool_ringparam *ring, 3756 struct kernel_ethtool_ringparam *kernel_ring, 3757 struct netlink_ext_ack *extack) 3758 { 3759 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3760 3761 if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq || 3762 ring->tx_pending > adapter->max_tx_entries_per_subcrq) { 3763 netdev_err(netdev, "Invalid request.\n"); 3764 netdev_err(netdev, "Max tx buffers = %llu\n", 3765 adapter->max_rx_add_entries_per_subcrq); 3766 netdev_err(netdev, "Max rx buffers = %llu\n", 3767 adapter->max_tx_entries_per_subcrq); 3768 return -EINVAL; 3769 } 3770 3771 adapter->desired.rx_entries = ring->rx_pending; 3772 adapter->desired.tx_entries = ring->tx_pending; 3773 3774 return wait_for_reset(adapter); 3775 } 3776 3777 static void ibmvnic_get_channels(struct net_device *netdev, 3778 struct ethtool_channels *channels) 3779 { 3780 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3781 3782 channels->max_rx = adapter->max_rx_queues; 3783 channels->max_tx = adapter->max_tx_queues; 3784 channels->max_other = 0; 3785 channels->max_combined = 0; 3786 channels->rx_count = adapter->req_rx_queues; 3787 channels->tx_count = adapter->req_tx_queues; 3788 channels->other_count = 0; 3789 channels->combined_count = 0; 3790 } 3791 3792 static int ibmvnic_set_channels(struct net_device *netdev, 3793 struct ethtool_channels *channels) 3794 { 3795 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 3796 3797 adapter->desired.rx_queues = channels->rx_count; 3798 adapter->desired.tx_queues = channels->tx_count; 3799 3800 return wait_for_reset(adapter); 3801 } 3802 3803 static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data) 3804 { 3805 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3806 int i; 3807 3808 if (stringset != ETH_SS_STATS) 3809 return; 3810 3811 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3812 ethtool_puts(&data, ibmvnic_stats[i].name); 3813 3814 for (i = 0; i < adapter->req_tx_queues; i++) { 3815 ethtool_sprintf(&data, "tx%d_batched_packets", i); 3816 ethtool_sprintf(&data, "tx%d_direct_packets", i); 3817 ethtool_sprintf(&data, "tx%d_bytes", i); 3818 ethtool_sprintf(&data, "tx%d_dropped_packets", i); 3819 } 3820 3821 for (i = 0; i < adapter->req_rx_queues; i++) { 3822 ethtool_sprintf(&data, "rx%d_packets", i); 3823 ethtool_sprintf(&data, "rx%d_bytes", i); 3824 ethtool_sprintf(&data, "rx%d_interrupts", i); 3825 } 3826 } 3827 3828 static int ibmvnic_get_sset_count(struct net_device *dev, int sset) 3829 { 3830 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3831 3832 switch (sset) { 3833 case ETH_SS_STATS: 3834 return ARRAY_SIZE(ibmvnic_stats) + 3835 adapter->req_tx_queues * NUM_TX_STATS + 3836 adapter->req_rx_queues * NUM_RX_STATS; 3837 default: 3838 return -EOPNOTSUPP; 3839 } 3840 } 3841 3842 static void ibmvnic_get_ethtool_stats(struct net_device *dev, 3843 struct ethtool_stats *stats, u64 *data) 3844 { 3845 struct ibmvnic_adapter *adapter = netdev_priv(dev); 3846 union ibmvnic_crq crq; 3847 int i, j; 3848 int rc; 3849 3850 memset(&crq, 0, sizeof(crq)); 3851 crq.request_statistics.first = IBMVNIC_CRQ_CMD; 3852 crq.request_statistics.cmd = REQUEST_STATISTICS; 3853 crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token); 3854 crq.request_statistics.len = 3855 cpu_to_be32(sizeof(struct ibmvnic_statistics)); 3856 3857 /* Wait for data to be written */ 3858 reinit_completion(&adapter->stats_done); 3859 rc = ibmvnic_send_crq(adapter, &crq); 3860 if (rc) 3861 return; 3862 rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000); 3863 if (rc) 3864 return; 3865 3866 for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++) 3867 data[i] = be64_to_cpu(IBMVNIC_GET_STAT 3868 (adapter, ibmvnic_stats[i].offset)); 3869 3870 for (j = 0; j < adapter->req_tx_queues; j++) { 3871 data[i] = adapter->tx_stats_buffers[j].batched_packets; 3872 i++; 3873 data[i] = adapter->tx_stats_buffers[j].direct_packets; 3874 i++; 3875 data[i] = adapter->tx_stats_buffers[j].bytes; 3876 i++; 3877 data[i] = adapter->tx_stats_buffers[j].dropped_packets; 3878 i++; 3879 } 3880 3881 for (j = 0; j < adapter->req_rx_queues; j++) { 3882 data[i] = adapter->rx_stats_buffers[j].packets; 3883 i++; 3884 data[i] = adapter->rx_stats_buffers[j].bytes; 3885 i++; 3886 data[i] = adapter->rx_stats_buffers[j].interrupts; 3887 i++; 3888 } 3889 } 3890 3891 static const struct ethtool_ops ibmvnic_ethtool_ops = { 3892 .get_drvinfo = ibmvnic_get_drvinfo, 3893 .get_msglevel = ibmvnic_get_msglevel, 3894 .set_msglevel = ibmvnic_set_msglevel, 3895 .get_link = ibmvnic_get_link, 3896 .get_ringparam = ibmvnic_get_ringparam, 3897 .set_ringparam = ibmvnic_set_ringparam, 3898 .get_channels = ibmvnic_get_channels, 3899 .set_channels = ibmvnic_set_channels, 3900 .get_strings = ibmvnic_get_strings, 3901 .get_sset_count = ibmvnic_get_sset_count, 3902 .get_ethtool_stats = ibmvnic_get_ethtool_stats, 3903 .get_link_ksettings = ibmvnic_get_link_ksettings, 3904 }; 3905 3906 /* Routines for managing CRQs/sCRQs */ 3907 3908 static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter, 3909 struct ibmvnic_sub_crq_queue *scrq) 3910 { 3911 int rc; 3912 3913 if (!scrq) { 3914 netdev_dbg(adapter->netdev, "Invalid scrq reset.\n"); 3915 return -EINVAL; 3916 } 3917 3918 if (scrq->irq) { 3919 free_irq(scrq->irq, scrq); 3920 irq_dispose_mapping(scrq->irq); 3921 scrq->irq = 0; 3922 } 3923 3924 if (scrq->msgs) { 3925 memset(scrq->msgs, 0, 4 * PAGE_SIZE); 3926 atomic_set(&scrq->used, 0); 3927 scrq->cur = 0; 3928 scrq->ind_buf.index = 0; 3929 } else { 3930 netdev_dbg(adapter->netdev, "Invalid scrq reset\n"); 3931 return -EINVAL; 3932 } 3933 3934 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 3935 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 3936 return rc; 3937 } 3938 3939 static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter) 3940 { 3941 int i, rc; 3942 3943 if (!adapter->tx_scrq || !adapter->rx_scrq) 3944 return -EINVAL; 3945 3946 ibmvnic_clean_affinity(adapter); 3947 3948 for (i = 0; i < adapter->req_tx_queues; i++) { 3949 netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i); 3950 rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]); 3951 if (rc) 3952 return rc; 3953 } 3954 3955 for (i = 0; i < adapter->req_rx_queues; i++) { 3956 netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i); 3957 rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]); 3958 if (rc) 3959 return rc; 3960 } 3961 3962 return rc; 3963 } 3964 3965 static void release_sub_crq_queue(struct ibmvnic_adapter *adapter, 3966 struct ibmvnic_sub_crq_queue *scrq, 3967 bool do_h_free) 3968 { 3969 struct device *dev = &adapter->vdev->dev; 3970 long rc; 3971 3972 netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n"); 3973 3974 if (do_h_free) { 3975 /* Close the sub-crqs */ 3976 do { 3977 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 3978 adapter->vdev->unit_address, 3979 scrq->crq_num); 3980 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 3981 3982 if (rc) { 3983 netdev_err(adapter->netdev, 3984 "Failed to release sub-CRQ %16lx, rc = %ld\n", 3985 scrq->crq_num, rc); 3986 } 3987 } 3988 3989 dma_free_coherent(dev, 3990 IBMVNIC_IND_ARR_SZ, 3991 scrq->ind_buf.indir_arr, 3992 scrq->ind_buf.indir_dma); 3993 3994 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 3995 DMA_BIDIRECTIONAL); 3996 free_pages((unsigned long)scrq->msgs, 2); 3997 free_cpumask_var(scrq->affinity_mask); 3998 kfree(scrq); 3999 } 4000 4001 static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter 4002 *adapter) 4003 { 4004 struct device *dev = &adapter->vdev->dev; 4005 struct ibmvnic_sub_crq_queue *scrq; 4006 int rc; 4007 4008 scrq = kzalloc(sizeof(*scrq), GFP_KERNEL); 4009 if (!scrq) 4010 return NULL; 4011 4012 scrq->msgs = 4013 (union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2); 4014 if (!scrq->msgs) { 4015 dev_warn(dev, "Couldn't allocate crq queue messages page\n"); 4016 goto zero_page_failed; 4017 } 4018 if (!zalloc_cpumask_var(&scrq->affinity_mask, GFP_KERNEL)) 4019 goto cpumask_alloc_failed; 4020 4021 scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE, 4022 DMA_BIDIRECTIONAL); 4023 if (dma_mapping_error(dev, scrq->msg_token)) { 4024 dev_warn(dev, "Couldn't map crq queue messages page\n"); 4025 goto map_failed; 4026 } 4027 4028 rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token, 4029 4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq); 4030 4031 if (rc == H_RESOURCE) 4032 rc = ibmvnic_reset_crq(adapter); 4033 4034 if (rc == H_CLOSED) { 4035 dev_warn(dev, "Partner adapter not ready, waiting.\n"); 4036 } else if (rc) { 4037 dev_warn(dev, "Error %d registering sub-crq\n", rc); 4038 goto reg_failed; 4039 } 4040 4041 scrq->adapter = adapter; 4042 scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs); 4043 scrq->ind_buf.index = 0; 4044 4045 scrq->ind_buf.indir_arr = 4046 dma_alloc_coherent(dev, 4047 IBMVNIC_IND_ARR_SZ, 4048 &scrq->ind_buf.indir_dma, 4049 GFP_KERNEL); 4050 4051 if (!scrq->ind_buf.indir_arr) 4052 goto indir_failed; 4053 4054 spin_lock_init(&scrq->lock); 4055 4056 netdev_dbg(adapter->netdev, 4057 "sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n", 4058 scrq->crq_num, scrq->hw_irq, scrq->irq); 4059 4060 return scrq; 4061 4062 indir_failed: 4063 do { 4064 rc = plpar_hcall_norets(H_FREE_SUB_CRQ, 4065 adapter->vdev->unit_address, 4066 scrq->crq_num); 4067 } while (rc == H_BUSY || rc == H_IS_LONG_BUSY(rc)); 4068 reg_failed: 4069 dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE, 4070 DMA_BIDIRECTIONAL); 4071 map_failed: 4072 free_cpumask_var(scrq->affinity_mask); 4073 cpumask_alloc_failed: 4074 free_pages((unsigned long)scrq->msgs, 2); 4075 zero_page_failed: 4076 kfree(scrq); 4077 4078 return NULL; 4079 } 4080 4081 static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free) 4082 { 4083 int i; 4084 4085 ibmvnic_clean_affinity(adapter); 4086 if (adapter->tx_scrq) { 4087 for (i = 0; i < adapter->num_active_tx_scrqs; i++) { 4088 if (!adapter->tx_scrq[i]) 4089 continue; 4090 4091 netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n", 4092 i); 4093 ibmvnic_tx_scrq_clean_buffer(adapter, adapter->tx_scrq[i]); 4094 if (adapter->tx_scrq[i]->irq) { 4095 free_irq(adapter->tx_scrq[i]->irq, 4096 adapter->tx_scrq[i]); 4097 irq_dispose_mapping(adapter->tx_scrq[i]->irq); 4098 adapter->tx_scrq[i]->irq = 0; 4099 } 4100 4101 release_sub_crq_queue(adapter, adapter->tx_scrq[i], 4102 do_h_free); 4103 } 4104 4105 kfree(adapter->tx_scrq); 4106 adapter->tx_scrq = NULL; 4107 adapter->num_active_tx_scrqs = 0; 4108 } 4109 4110 /* Clean any remaining outstanding SKBs 4111 * we freed the irq so we won't be hearing 4112 * from them 4113 */ 4114 clean_tx_pools(adapter); 4115 4116 if (adapter->rx_scrq) { 4117 for (i = 0; i < adapter->num_active_rx_scrqs; i++) { 4118 if (!adapter->rx_scrq[i]) 4119 continue; 4120 4121 netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n", 4122 i); 4123 if (adapter->rx_scrq[i]->irq) { 4124 free_irq(adapter->rx_scrq[i]->irq, 4125 adapter->rx_scrq[i]); 4126 irq_dispose_mapping(adapter->rx_scrq[i]->irq); 4127 adapter->rx_scrq[i]->irq = 0; 4128 } 4129 4130 release_sub_crq_queue(adapter, adapter->rx_scrq[i], 4131 do_h_free); 4132 } 4133 4134 kfree(adapter->rx_scrq); 4135 adapter->rx_scrq = NULL; 4136 adapter->num_active_rx_scrqs = 0; 4137 } 4138 } 4139 4140 static int disable_scrq_irq(struct ibmvnic_adapter *adapter, 4141 struct ibmvnic_sub_crq_queue *scrq) 4142 { 4143 struct device *dev = &adapter->vdev->dev; 4144 unsigned long rc; 4145 4146 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4147 H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 4148 if (rc) 4149 dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n", 4150 scrq->hw_irq, rc); 4151 return rc; 4152 } 4153 4154 /* We can not use the IRQ chip EOI handler because that has the 4155 * unintended effect of changing the interrupt priority. 4156 */ 4157 static void ibmvnic_xics_eoi(struct device *dev, struct ibmvnic_sub_crq_queue *scrq) 4158 { 4159 u64 val = 0xff000000 | scrq->hw_irq; 4160 unsigned long rc; 4161 4162 rc = plpar_hcall_norets(H_EOI, val); 4163 if (rc) 4164 dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n", val, rc); 4165 } 4166 4167 /* Due to a firmware bug, the hypervisor can send an interrupt to a 4168 * transmit or receive queue just prior to a partition migration. 4169 * Force an EOI after migration. 4170 */ 4171 static void ibmvnic_clear_pending_interrupt(struct device *dev, 4172 struct ibmvnic_sub_crq_queue *scrq) 4173 { 4174 if (!xive_enabled()) 4175 ibmvnic_xics_eoi(dev, scrq); 4176 } 4177 4178 static int enable_scrq_irq(struct ibmvnic_adapter *adapter, 4179 struct ibmvnic_sub_crq_queue *scrq) 4180 { 4181 struct device *dev = &adapter->vdev->dev; 4182 unsigned long rc; 4183 4184 if (scrq->hw_irq > 0x100000000ULL) { 4185 dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq); 4186 return 1; 4187 } 4188 4189 if (test_bit(0, &adapter->resetting) && 4190 adapter->reset_reason == VNIC_RESET_MOBILITY) { 4191 ibmvnic_clear_pending_interrupt(dev, scrq); 4192 } 4193 4194 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 4195 H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0); 4196 if (rc) 4197 dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n", 4198 scrq->hw_irq, rc); 4199 return rc; 4200 } 4201 4202 static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter, 4203 struct ibmvnic_sub_crq_queue *scrq) 4204 { 4205 struct device *dev = &adapter->vdev->dev; 4206 int num_packets = 0, total_bytes = 0; 4207 struct ibmvnic_tx_pool *tx_pool; 4208 struct ibmvnic_tx_buff *txbuff; 4209 struct netdev_queue *txq; 4210 union sub_crq *next; 4211 int index, i; 4212 4213 restart_loop: 4214 while (pending_scrq(adapter, scrq)) { 4215 unsigned int pool = scrq->pool_index; 4216 int num_entries = 0; 4217 next = ibmvnic_next_scrq(adapter, scrq); 4218 for (i = 0; i < next->tx_comp.num_comps; i++) { 4219 index = be32_to_cpu(next->tx_comp.correlators[i]); 4220 if (index & IBMVNIC_TSO_POOL_MASK) { 4221 tx_pool = &adapter->tso_pool[pool]; 4222 index &= ~IBMVNIC_TSO_POOL_MASK; 4223 } else { 4224 tx_pool = &adapter->tx_pool[pool]; 4225 } 4226 4227 txbuff = &tx_pool->tx_buff[index]; 4228 num_packets++; 4229 num_entries += txbuff->num_entries; 4230 if (txbuff->skb) { 4231 total_bytes += txbuff->skb->len; 4232 if (next->tx_comp.rcs[i]) { 4233 dev_err(dev, "tx error %x\n", 4234 next->tx_comp.rcs[i]); 4235 dev_kfree_skb_irq(txbuff->skb); 4236 } else { 4237 dev_consume_skb_irq(txbuff->skb); 4238 } 4239 txbuff->skb = NULL; 4240 } else { 4241 netdev_warn(adapter->netdev, 4242 "TX completion received with NULL socket buffer\n"); 4243 } 4244 tx_pool->free_map[tx_pool->producer_index] = index; 4245 tx_pool->producer_index = 4246 (tx_pool->producer_index + 1) % 4247 tx_pool->num_buffers; 4248 } 4249 /* remove tx_comp scrq*/ 4250 next->tx_comp.first = 0; 4251 4252 4253 if (atomic_sub_return(num_entries, &scrq->used) <= 4254 (adapter->req_tx_entries_per_subcrq / 2) && 4255 __netif_subqueue_stopped(adapter->netdev, 4256 scrq->pool_index)) { 4257 rcu_read_lock(); 4258 if (adapter->tx_queues_active) { 4259 netif_wake_subqueue(adapter->netdev, 4260 scrq->pool_index); 4261 netdev_dbg(adapter->netdev, 4262 "Started queue %d\n", 4263 scrq->pool_index); 4264 } 4265 rcu_read_unlock(); 4266 } 4267 } 4268 4269 enable_scrq_irq(adapter, scrq); 4270 4271 if (pending_scrq(adapter, scrq)) { 4272 disable_scrq_irq(adapter, scrq); 4273 goto restart_loop; 4274 } 4275 4276 txq = netdev_get_tx_queue(adapter->netdev, scrq->pool_index); 4277 netdev_tx_completed_queue(txq, num_packets, total_bytes); 4278 4279 return 0; 4280 } 4281 4282 static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance) 4283 { 4284 struct ibmvnic_sub_crq_queue *scrq = instance; 4285 struct ibmvnic_adapter *adapter = scrq->adapter; 4286 4287 disable_scrq_irq(adapter, scrq); 4288 ibmvnic_complete_tx(adapter, scrq); 4289 4290 return IRQ_HANDLED; 4291 } 4292 4293 static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance) 4294 { 4295 struct ibmvnic_sub_crq_queue *scrq = instance; 4296 struct ibmvnic_adapter *adapter = scrq->adapter; 4297 4298 /* When booting a kdump kernel we can hit pending interrupts 4299 * prior to completing driver initialization. 4300 */ 4301 if (unlikely(adapter->state != VNIC_OPEN)) 4302 return IRQ_NONE; 4303 4304 adapter->rx_stats_buffers[scrq->scrq_num].interrupts++; 4305 4306 if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) { 4307 disable_scrq_irq(adapter, scrq); 4308 __napi_schedule(&adapter->napi[scrq->scrq_num]); 4309 } 4310 4311 return IRQ_HANDLED; 4312 } 4313 4314 static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter) 4315 { 4316 struct device *dev = &adapter->vdev->dev; 4317 struct ibmvnic_sub_crq_queue *scrq; 4318 int i = 0, j = 0; 4319 int rc = 0; 4320 4321 for (i = 0; i < adapter->req_tx_queues; i++) { 4322 netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n", 4323 i); 4324 scrq = adapter->tx_scrq[i]; 4325 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 4326 4327 if (!scrq->irq) { 4328 rc = -EINVAL; 4329 dev_err(dev, "Error mapping irq\n"); 4330 goto req_tx_irq_failed; 4331 } 4332 4333 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d", 4334 adapter->vdev->unit_address, i); 4335 rc = request_irq(scrq->irq, ibmvnic_interrupt_tx, 4336 0, scrq->name, scrq); 4337 4338 if (rc) { 4339 dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n", 4340 scrq->irq, rc); 4341 irq_dispose_mapping(scrq->irq); 4342 goto req_tx_irq_failed; 4343 } 4344 } 4345 4346 for (i = 0; i < adapter->req_rx_queues; i++) { 4347 netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n", 4348 i); 4349 scrq = adapter->rx_scrq[i]; 4350 scrq->irq = irq_create_mapping(NULL, scrq->hw_irq); 4351 if (!scrq->irq) { 4352 rc = -EINVAL; 4353 dev_err(dev, "Error mapping irq\n"); 4354 goto req_rx_irq_failed; 4355 } 4356 snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d", 4357 adapter->vdev->unit_address, i); 4358 rc = request_irq(scrq->irq, ibmvnic_interrupt_rx, 4359 0, scrq->name, scrq); 4360 if (rc) { 4361 dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n", 4362 scrq->irq, rc); 4363 irq_dispose_mapping(scrq->irq); 4364 goto req_rx_irq_failed; 4365 } 4366 } 4367 4368 cpus_read_lock(); 4369 ibmvnic_set_affinity(adapter); 4370 cpus_read_unlock(); 4371 4372 return rc; 4373 4374 req_rx_irq_failed: 4375 for (j = 0; j < i; j++) { 4376 free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]); 4377 irq_dispose_mapping(adapter->rx_scrq[j]->irq); 4378 } 4379 i = adapter->req_tx_queues; 4380 req_tx_irq_failed: 4381 for (j = 0; j < i; j++) { 4382 free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]); 4383 irq_dispose_mapping(adapter->tx_scrq[j]->irq); 4384 } 4385 release_sub_crqs(adapter, 1); 4386 return rc; 4387 } 4388 4389 static int init_sub_crqs(struct ibmvnic_adapter *adapter) 4390 { 4391 struct device *dev = &adapter->vdev->dev; 4392 struct ibmvnic_sub_crq_queue **allqueues; 4393 int registered_queues = 0; 4394 int total_queues; 4395 int more = 0; 4396 int i; 4397 4398 total_queues = adapter->req_tx_queues + adapter->req_rx_queues; 4399 4400 allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL); 4401 if (!allqueues) 4402 return -ENOMEM; 4403 4404 for (i = 0; i < total_queues; i++) { 4405 allqueues[i] = init_sub_crq_queue(adapter); 4406 if (!allqueues[i]) { 4407 dev_warn(dev, "Couldn't allocate all sub-crqs\n"); 4408 break; 4409 } 4410 registered_queues++; 4411 } 4412 4413 /* Make sure we were able to register the minimum number of queues */ 4414 if (registered_queues < 4415 adapter->min_tx_queues + adapter->min_rx_queues) { 4416 dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n"); 4417 goto tx_failed; 4418 } 4419 4420 /* Distribute the failed allocated queues*/ 4421 for (i = 0; i < total_queues - registered_queues + more ; i++) { 4422 netdev_dbg(adapter->netdev, "Reducing number of queues\n"); 4423 switch (i % 3) { 4424 case 0: 4425 if (adapter->req_rx_queues > adapter->min_rx_queues) 4426 adapter->req_rx_queues--; 4427 else 4428 more++; 4429 break; 4430 case 1: 4431 if (adapter->req_tx_queues > adapter->min_tx_queues) 4432 adapter->req_tx_queues--; 4433 else 4434 more++; 4435 break; 4436 } 4437 } 4438 4439 adapter->tx_scrq = kcalloc(adapter->req_tx_queues, 4440 sizeof(*adapter->tx_scrq), GFP_KERNEL); 4441 if (!adapter->tx_scrq) 4442 goto tx_failed; 4443 4444 for (i = 0; i < adapter->req_tx_queues; i++) { 4445 adapter->tx_scrq[i] = allqueues[i]; 4446 adapter->tx_scrq[i]->pool_index = i; 4447 adapter->num_active_tx_scrqs++; 4448 } 4449 4450 adapter->rx_scrq = kcalloc(adapter->req_rx_queues, 4451 sizeof(*adapter->rx_scrq), GFP_KERNEL); 4452 if (!adapter->rx_scrq) 4453 goto rx_failed; 4454 4455 for (i = 0; i < adapter->req_rx_queues; i++) { 4456 adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues]; 4457 adapter->rx_scrq[i]->scrq_num = i; 4458 adapter->num_active_rx_scrqs++; 4459 } 4460 4461 kfree(allqueues); 4462 return 0; 4463 4464 rx_failed: 4465 kfree(adapter->tx_scrq); 4466 adapter->tx_scrq = NULL; 4467 tx_failed: 4468 for (i = 0; i < registered_queues; i++) 4469 release_sub_crq_queue(adapter, allqueues[i], 1); 4470 kfree(allqueues); 4471 return -ENOMEM; 4472 } 4473 4474 static void send_request_cap(struct ibmvnic_adapter *adapter, int retry) 4475 { 4476 struct device *dev = &adapter->vdev->dev; 4477 union ibmvnic_crq crq; 4478 int max_entries; 4479 int cap_reqs; 4480 4481 /* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on 4482 * the PROMISC flag). Initialize this count upfront. When the tasklet 4483 * receives a response to all of these, it will send the next protocol 4484 * message (QUERY_IP_OFFLOAD). 4485 */ 4486 if (!(adapter->netdev->flags & IFF_PROMISC) || 4487 adapter->promisc_supported) 4488 cap_reqs = 7; 4489 else 4490 cap_reqs = 6; 4491 4492 if (!retry) { 4493 /* Sub-CRQ entries are 32 byte long */ 4494 int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4); 4495 4496 atomic_set(&adapter->running_cap_crqs, cap_reqs); 4497 4498 if (adapter->min_tx_entries_per_subcrq > entries_page || 4499 adapter->min_rx_add_entries_per_subcrq > entries_page) { 4500 dev_err(dev, "Fatal, invalid entries per sub-crq\n"); 4501 return; 4502 } 4503 4504 if (adapter->desired.mtu) 4505 adapter->req_mtu = adapter->desired.mtu; 4506 else 4507 adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN; 4508 4509 if (!adapter->desired.tx_entries) 4510 adapter->desired.tx_entries = 4511 adapter->max_tx_entries_per_subcrq; 4512 if (!adapter->desired.rx_entries) 4513 adapter->desired.rx_entries = 4514 adapter->max_rx_add_entries_per_subcrq; 4515 4516 max_entries = IBMVNIC_LTB_SET_SIZE / 4517 (adapter->req_mtu + IBMVNIC_BUFFER_HLEN); 4518 4519 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4520 adapter->desired.tx_entries > IBMVNIC_LTB_SET_SIZE) { 4521 adapter->desired.tx_entries = max_entries; 4522 } 4523 4524 if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) * 4525 adapter->desired.rx_entries > IBMVNIC_LTB_SET_SIZE) { 4526 adapter->desired.rx_entries = max_entries; 4527 } 4528 4529 if (adapter->desired.tx_entries) 4530 adapter->req_tx_entries_per_subcrq = 4531 adapter->desired.tx_entries; 4532 else 4533 adapter->req_tx_entries_per_subcrq = 4534 adapter->max_tx_entries_per_subcrq; 4535 4536 if (adapter->desired.rx_entries) 4537 adapter->req_rx_add_entries_per_subcrq = 4538 adapter->desired.rx_entries; 4539 else 4540 adapter->req_rx_add_entries_per_subcrq = 4541 adapter->max_rx_add_entries_per_subcrq; 4542 4543 if (adapter->desired.tx_queues) 4544 adapter->req_tx_queues = 4545 adapter->desired.tx_queues; 4546 else 4547 adapter->req_tx_queues = 4548 adapter->opt_tx_comp_sub_queues; 4549 4550 if (adapter->desired.rx_queues) 4551 adapter->req_rx_queues = 4552 adapter->desired.rx_queues; 4553 else 4554 adapter->req_rx_queues = 4555 adapter->opt_rx_comp_queues; 4556 4557 adapter->req_rx_add_queues = adapter->max_rx_add_queues; 4558 } else { 4559 atomic_add(cap_reqs, &adapter->running_cap_crqs); 4560 } 4561 memset(&crq, 0, sizeof(crq)); 4562 crq.request_capability.first = IBMVNIC_CRQ_CMD; 4563 crq.request_capability.cmd = REQUEST_CAPABILITY; 4564 4565 crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES); 4566 crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues); 4567 cap_reqs--; 4568 ibmvnic_send_crq(adapter, &crq); 4569 4570 crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES); 4571 crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues); 4572 cap_reqs--; 4573 ibmvnic_send_crq(adapter, &crq); 4574 4575 crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES); 4576 crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues); 4577 cap_reqs--; 4578 ibmvnic_send_crq(adapter, &crq); 4579 4580 crq.request_capability.capability = 4581 cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ); 4582 crq.request_capability.number = 4583 cpu_to_be64(adapter->req_tx_entries_per_subcrq); 4584 cap_reqs--; 4585 ibmvnic_send_crq(adapter, &crq); 4586 4587 crq.request_capability.capability = 4588 cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ); 4589 crq.request_capability.number = 4590 cpu_to_be64(adapter->req_rx_add_entries_per_subcrq); 4591 cap_reqs--; 4592 ibmvnic_send_crq(adapter, &crq); 4593 4594 crq.request_capability.capability = cpu_to_be16(REQ_MTU); 4595 crq.request_capability.number = cpu_to_be64(adapter->req_mtu); 4596 cap_reqs--; 4597 ibmvnic_send_crq(adapter, &crq); 4598 4599 if (adapter->netdev->flags & IFF_PROMISC) { 4600 if (adapter->promisc_supported) { 4601 crq.request_capability.capability = 4602 cpu_to_be16(PROMISC_REQUESTED); 4603 crq.request_capability.number = cpu_to_be64(1); 4604 cap_reqs--; 4605 ibmvnic_send_crq(adapter, &crq); 4606 } 4607 } else { 4608 crq.request_capability.capability = 4609 cpu_to_be16(PROMISC_REQUESTED); 4610 crq.request_capability.number = cpu_to_be64(0); 4611 cap_reqs--; 4612 ibmvnic_send_crq(adapter, &crq); 4613 } 4614 4615 /* Keep at end to catch any discrepancy between expected and actual 4616 * CRQs sent. 4617 */ 4618 WARN_ON(cap_reqs != 0); 4619 } 4620 4621 static int pending_scrq(struct ibmvnic_adapter *adapter, 4622 struct ibmvnic_sub_crq_queue *scrq) 4623 { 4624 union sub_crq *entry = &scrq->msgs[scrq->cur]; 4625 int rc; 4626 4627 rc = !!(entry->generic.first & IBMVNIC_CRQ_CMD_RSP); 4628 4629 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4630 * contents of the SCRQ descriptor 4631 */ 4632 dma_rmb(); 4633 4634 return rc; 4635 } 4636 4637 static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter, 4638 struct ibmvnic_sub_crq_queue *scrq) 4639 { 4640 union sub_crq *entry; 4641 unsigned long flags; 4642 4643 spin_lock_irqsave(&scrq->lock, flags); 4644 entry = &scrq->msgs[scrq->cur]; 4645 if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4646 if (++scrq->cur == scrq->size) 4647 scrq->cur = 0; 4648 } else { 4649 entry = NULL; 4650 } 4651 spin_unlock_irqrestore(&scrq->lock, flags); 4652 4653 /* Ensure that the SCRQ valid flag is loaded prior to loading the 4654 * contents of the SCRQ descriptor 4655 */ 4656 dma_rmb(); 4657 4658 return entry; 4659 } 4660 4661 static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter) 4662 { 4663 struct ibmvnic_crq_queue *queue = &adapter->crq; 4664 union ibmvnic_crq *crq; 4665 4666 crq = &queue->msgs[queue->cur]; 4667 if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) { 4668 if (++queue->cur == queue->size) 4669 queue->cur = 0; 4670 } else { 4671 crq = NULL; 4672 } 4673 4674 return crq; 4675 } 4676 4677 static void print_subcrq_error(struct device *dev, int rc, const char *func) 4678 { 4679 switch (rc) { 4680 case H_PARAMETER: 4681 dev_warn_ratelimited(dev, 4682 "%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n", 4683 func, rc); 4684 break; 4685 case H_CLOSED: 4686 dev_warn_ratelimited(dev, 4687 "%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n", 4688 func, rc); 4689 break; 4690 default: 4691 dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc); 4692 break; 4693 } 4694 } 4695 4696 static int send_subcrq_indirect(struct ibmvnic_adapter *adapter, 4697 u64 remote_handle, u64 ioba, u64 num_entries) 4698 { 4699 unsigned int ua = adapter->vdev->unit_address; 4700 struct device *dev = &adapter->vdev->dev; 4701 int rc; 4702 4703 /* Make sure the hypervisor sees the complete request */ 4704 dma_wmb(); 4705 rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua, 4706 cpu_to_be64(remote_handle), 4707 ioba, num_entries); 4708 4709 if (rc) 4710 print_subcrq_error(dev, rc, __func__); 4711 4712 return rc; 4713 } 4714 4715 static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter, 4716 union ibmvnic_crq *crq) 4717 { 4718 unsigned int ua = adapter->vdev->unit_address; 4719 struct device *dev = &adapter->vdev->dev; 4720 u64 *u64_crq = (u64 *)crq; 4721 int rc; 4722 4723 netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n", 4724 (unsigned long)cpu_to_be64(u64_crq[0]), 4725 (unsigned long)cpu_to_be64(u64_crq[1])); 4726 4727 if (!adapter->crq.active && 4728 crq->generic.first != IBMVNIC_CRQ_INIT_CMD) { 4729 dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n"); 4730 return -EINVAL; 4731 } 4732 4733 /* Make sure the hypervisor sees the complete request */ 4734 dma_wmb(); 4735 4736 rc = plpar_hcall_norets(H_SEND_CRQ, ua, 4737 cpu_to_be64(u64_crq[0]), 4738 cpu_to_be64(u64_crq[1])); 4739 4740 if (rc) { 4741 if (rc == H_CLOSED) { 4742 dev_warn(dev, "CRQ Queue closed\n"); 4743 /* do not reset, report the fail, wait for passive init from server */ 4744 } 4745 4746 dev_warn(dev, "Send error (rc=%d)\n", rc); 4747 } 4748 4749 return rc; 4750 } 4751 4752 static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter) 4753 { 4754 struct device *dev = &adapter->vdev->dev; 4755 union ibmvnic_crq crq; 4756 int retries = 100; 4757 int rc; 4758 4759 memset(&crq, 0, sizeof(crq)); 4760 crq.generic.first = IBMVNIC_CRQ_INIT_CMD; 4761 crq.generic.cmd = IBMVNIC_CRQ_INIT; 4762 netdev_dbg(adapter->netdev, "Sending CRQ init\n"); 4763 4764 do { 4765 rc = ibmvnic_send_crq(adapter, &crq); 4766 if (rc != H_CLOSED) 4767 break; 4768 retries--; 4769 msleep(50); 4770 4771 } while (retries > 0); 4772 4773 if (rc) { 4774 dev_err(dev, "Failed to send init request, rc = %d\n", rc); 4775 return rc; 4776 } 4777 4778 return 0; 4779 } 4780 4781 struct vnic_login_client_data { 4782 u8 type; 4783 __be16 len; 4784 char name[]; 4785 } __packed; 4786 4787 static int vnic_client_data_len(struct ibmvnic_adapter *adapter) 4788 { 4789 int len; 4790 4791 /* Calculate the amount of buffer space needed for the 4792 * vnic client data in the login buffer. There are four entries, 4793 * OS name, LPAR name, device name, and a null last entry. 4794 */ 4795 len = 4 * sizeof(struct vnic_login_client_data); 4796 len += 6; /* "Linux" plus NULL */ 4797 len += strlen(utsname()->nodename) + 1; 4798 len += strlen(adapter->netdev->name) + 1; 4799 4800 return len; 4801 } 4802 4803 static void vnic_add_client_data(struct ibmvnic_adapter *adapter, 4804 struct vnic_login_client_data *vlcd) 4805 { 4806 const char *os_name = "Linux"; 4807 int len; 4808 4809 /* Type 1 - LPAR OS */ 4810 vlcd->type = 1; 4811 len = strlen(os_name) + 1; 4812 vlcd->len = cpu_to_be16(len); 4813 strscpy(vlcd->name, os_name, len); 4814 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4815 4816 /* Type 2 - LPAR name */ 4817 vlcd->type = 2; 4818 len = strlen(utsname()->nodename) + 1; 4819 vlcd->len = cpu_to_be16(len); 4820 strscpy(vlcd->name, utsname()->nodename, len); 4821 vlcd = (struct vnic_login_client_data *)(vlcd->name + len); 4822 4823 /* Type 3 - device name */ 4824 vlcd->type = 3; 4825 len = strlen(adapter->netdev->name) + 1; 4826 vlcd->len = cpu_to_be16(len); 4827 strscpy(vlcd->name, adapter->netdev->name, len); 4828 } 4829 4830 static int send_login(struct ibmvnic_adapter *adapter) 4831 { 4832 struct ibmvnic_login_rsp_buffer *login_rsp_buffer; 4833 struct ibmvnic_login_buffer *login_buffer; 4834 struct device *dev = &adapter->vdev->dev; 4835 struct vnic_login_client_data *vlcd; 4836 dma_addr_t rsp_buffer_token; 4837 dma_addr_t buffer_token; 4838 size_t rsp_buffer_size; 4839 union ibmvnic_crq crq; 4840 int client_data_len; 4841 size_t buffer_size; 4842 __be64 *tx_list_p; 4843 __be64 *rx_list_p; 4844 int rc; 4845 int i; 4846 4847 if (!adapter->tx_scrq || !adapter->rx_scrq) { 4848 netdev_err(adapter->netdev, 4849 "RX or TX queues are not allocated, device login failed\n"); 4850 return -ENOMEM; 4851 } 4852 4853 release_login_buffer(adapter); 4854 release_login_rsp_buffer(adapter); 4855 4856 client_data_len = vnic_client_data_len(adapter); 4857 4858 buffer_size = 4859 sizeof(struct ibmvnic_login_buffer) + 4860 sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) + 4861 client_data_len; 4862 4863 login_buffer = kzalloc(buffer_size, GFP_ATOMIC); 4864 if (!login_buffer) 4865 goto buf_alloc_failed; 4866 4867 buffer_token = dma_map_single(dev, login_buffer, buffer_size, 4868 DMA_TO_DEVICE); 4869 if (dma_mapping_error(dev, buffer_token)) { 4870 dev_err(dev, "Couldn't map login buffer\n"); 4871 goto buf_map_failed; 4872 } 4873 4874 rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) + 4875 sizeof(u64) * adapter->req_tx_queues + 4876 sizeof(u64) * adapter->req_rx_queues + 4877 sizeof(u64) * adapter->req_rx_queues + 4878 sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS; 4879 4880 login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC); 4881 if (!login_rsp_buffer) 4882 goto buf_rsp_alloc_failed; 4883 4884 rsp_buffer_token = dma_map_single(dev, login_rsp_buffer, 4885 rsp_buffer_size, DMA_FROM_DEVICE); 4886 if (dma_mapping_error(dev, rsp_buffer_token)) { 4887 dev_err(dev, "Couldn't map login rsp buffer\n"); 4888 goto buf_rsp_map_failed; 4889 } 4890 4891 adapter->login_buf = login_buffer; 4892 adapter->login_buf_token = buffer_token; 4893 adapter->login_buf_sz = buffer_size; 4894 adapter->login_rsp_buf = login_rsp_buffer; 4895 adapter->login_rsp_buf_token = rsp_buffer_token; 4896 adapter->login_rsp_buf_sz = rsp_buffer_size; 4897 4898 login_buffer->len = cpu_to_be32(buffer_size); 4899 login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB); 4900 login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues); 4901 login_buffer->off_txcomp_subcrqs = 4902 cpu_to_be32(sizeof(struct ibmvnic_login_buffer)); 4903 login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues); 4904 login_buffer->off_rxcomp_subcrqs = 4905 cpu_to_be32(sizeof(struct ibmvnic_login_buffer) + 4906 sizeof(u64) * adapter->req_tx_queues); 4907 login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token); 4908 login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size); 4909 4910 tx_list_p = (__be64 *)((char *)login_buffer + 4911 sizeof(struct ibmvnic_login_buffer)); 4912 rx_list_p = (__be64 *)((char *)login_buffer + 4913 sizeof(struct ibmvnic_login_buffer) + 4914 sizeof(u64) * adapter->req_tx_queues); 4915 4916 for (i = 0; i < adapter->req_tx_queues; i++) { 4917 if (adapter->tx_scrq[i]) { 4918 tx_list_p[i] = 4919 cpu_to_be64(adapter->tx_scrq[i]->crq_num); 4920 } 4921 } 4922 4923 for (i = 0; i < adapter->req_rx_queues; i++) { 4924 if (adapter->rx_scrq[i]) { 4925 rx_list_p[i] = 4926 cpu_to_be64(adapter->rx_scrq[i]->crq_num); 4927 } 4928 } 4929 4930 /* Insert vNIC login client data */ 4931 vlcd = (struct vnic_login_client_data *) 4932 ((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues)); 4933 login_buffer->client_data_offset = 4934 cpu_to_be32((char *)vlcd - (char *)login_buffer); 4935 login_buffer->client_data_len = cpu_to_be32(client_data_len); 4936 4937 vnic_add_client_data(adapter, vlcd); 4938 4939 netdev_dbg(adapter->netdev, "Login Buffer:\n"); 4940 for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { 4941 netdev_dbg(adapter->netdev, "%016lx\n", 4942 ((unsigned long *)(adapter->login_buf))[i]); 4943 } 4944 4945 memset(&crq, 0, sizeof(crq)); 4946 crq.login.first = IBMVNIC_CRQ_CMD; 4947 crq.login.cmd = LOGIN; 4948 crq.login.ioba = cpu_to_be32(buffer_token); 4949 crq.login.len = cpu_to_be32(buffer_size); 4950 4951 adapter->login_pending = true; 4952 rc = ibmvnic_send_crq(adapter, &crq); 4953 if (rc) { 4954 adapter->login_pending = false; 4955 netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc); 4956 goto buf_send_failed; 4957 } 4958 4959 return 0; 4960 4961 buf_send_failed: 4962 dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size, 4963 DMA_FROM_DEVICE); 4964 buf_rsp_map_failed: 4965 kfree(login_rsp_buffer); 4966 adapter->login_rsp_buf = NULL; 4967 buf_rsp_alloc_failed: 4968 dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE); 4969 buf_map_failed: 4970 kfree(login_buffer); 4971 adapter->login_buf = NULL; 4972 buf_alloc_failed: 4973 return -ENOMEM; 4974 } 4975 4976 static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr, 4977 u32 len, u8 map_id) 4978 { 4979 union ibmvnic_crq crq; 4980 4981 memset(&crq, 0, sizeof(crq)); 4982 crq.request_map.first = IBMVNIC_CRQ_CMD; 4983 crq.request_map.cmd = REQUEST_MAP; 4984 crq.request_map.map_id = map_id; 4985 crq.request_map.ioba = cpu_to_be32(addr); 4986 crq.request_map.len = cpu_to_be32(len); 4987 return ibmvnic_send_crq(adapter, &crq); 4988 } 4989 4990 static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id) 4991 { 4992 union ibmvnic_crq crq; 4993 4994 memset(&crq, 0, sizeof(crq)); 4995 crq.request_unmap.first = IBMVNIC_CRQ_CMD; 4996 crq.request_unmap.cmd = REQUEST_UNMAP; 4997 crq.request_unmap.map_id = map_id; 4998 return ibmvnic_send_crq(adapter, &crq); 4999 } 5000 5001 static void send_query_map(struct ibmvnic_adapter *adapter) 5002 { 5003 union ibmvnic_crq crq; 5004 5005 memset(&crq, 0, sizeof(crq)); 5006 crq.query_map.first = IBMVNIC_CRQ_CMD; 5007 crq.query_map.cmd = QUERY_MAP; 5008 ibmvnic_send_crq(adapter, &crq); 5009 } 5010 5011 /* Send a series of CRQs requesting various capabilities of the VNIC server */ 5012 static void send_query_cap(struct ibmvnic_adapter *adapter) 5013 { 5014 union ibmvnic_crq crq; 5015 int cap_reqs; 5016 5017 /* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count 5018 * upfront. When the tasklet receives a response to all of these, it 5019 * can send out the next protocol messaage (REQUEST_CAPABILITY). 5020 */ 5021 cap_reqs = 25; 5022 5023 atomic_set(&adapter->running_cap_crqs, cap_reqs); 5024 5025 memset(&crq, 0, sizeof(crq)); 5026 crq.query_capability.first = IBMVNIC_CRQ_CMD; 5027 crq.query_capability.cmd = QUERY_CAPABILITY; 5028 5029 crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES); 5030 ibmvnic_send_crq(adapter, &crq); 5031 cap_reqs--; 5032 5033 crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES); 5034 ibmvnic_send_crq(adapter, &crq); 5035 cap_reqs--; 5036 5037 crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES); 5038 ibmvnic_send_crq(adapter, &crq); 5039 cap_reqs--; 5040 5041 crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES); 5042 ibmvnic_send_crq(adapter, &crq); 5043 cap_reqs--; 5044 5045 crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES); 5046 ibmvnic_send_crq(adapter, &crq); 5047 cap_reqs--; 5048 5049 crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES); 5050 ibmvnic_send_crq(adapter, &crq); 5051 cap_reqs--; 5052 5053 crq.query_capability.capability = 5054 cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ); 5055 ibmvnic_send_crq(adapter, &crq); 5056 cap_reqs--; 5057 5058 crq.query_capability.capability = 5059 cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ); 5060 ibmvnic_send_crq(adapter, &crq); 5061 cap_reqs--; 5062 5063 crq.query_capability.capability = 5064 cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ); 5065 ibmvnic_send_crq(adapter, &crq); 5066 cap_reqs--; 5067 5068 crq.query_capability.capability = 5069 cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ); 5070 ibmvnic_send_crq(adapter, &crq); 5071 cap_reqs--; 5072 5073 crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD); 5074 ibmvnic_send_crq(adapter, &crq); 5075 cap_reqs--; 5076 5077 crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED); 5078 ibmvnic_send_crq(adapter, &crq); 5079 cap_reqs--; 5080 5081 crq.query_capability.capability = cpu_to_be16(MIN_MTU); 5082 ibmvnic_send_crq(adapter, &crq); 5083 cap_reqs--; 5084 5085 crq.query_capability.capability = cpu_to_be16(MAX_MTU); 5086 ibmvnic_send_crq(adapter, &crq); 5087 cap_reqs--; 5088 5089 crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS); 5090 ibmvnic_send_crq(adapter, &crq); 5091 cap_reqs--; 5092 5093 crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION); 5094 ibmvnic_send_crq(adapter, &crq); 5095 cap_reqs--; 5096 5097 crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION); 5098 ibmvnic_send_crq(adapter, &crq); 5099 cap_reqs--; 5100 5101 crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES); 5102 ibmvnic_send_crq(adapter, &crq); 5103 cap_reqs--; 5104 5105 crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED); 5106 ibmvnic_send_crq(adapter, &crq); 5107 cap_reqs--; 5108 5109 crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES); 5110 ibmvnic_send_crq(adapter, &crq); 5111 cap_reqs--; 5112 5113 crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES); 5114 ibmvnic_send_crq(adapter, &crq); 5115 cap_reqs--; 5116 5117 crq.query_capability.capability = 5118 cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q); 5119 ibmvnic_send_crq(adapter, &crq); 5120 cap_reqs--; 5121 5122 crq.query_capability.capability = 5123 cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ); 5124 ibmvnic_send_crq(adapter, &crq); 5125 cap_reqs--; 5126 5127 crq.query_capability.capability = 5128 cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ); 5129 ibmvnic_send_crq(adapter, &crq); 5130 cap_reqs--; 5131 5132 crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ); 5133 5134 ibmvnic_send_crq(adapter, &crq); 5135 cap_reqs--; 5136 5137 /* Keep at end to catch any discrepancy between expected and actual 5138 * CRQs sent. 5139 */ 5140 WARN_ON(cap_reqs != 0); 5141 } 5142 5143 static void send_query_ip_offload(struct ibmvnic_adapter *adapter) 5144 { 5145 int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer); 5146 struct device *dev = &adapter->vdev->dev; 5147 union ibmvnic_crq crq; 5148 5149 adapter->ip_offload_tok = 5150 dma_map_single(dev, 5151 &adapter->ip_offload_buf, 5152 buf_sz, 5153 DMA_FROM_DEVICE); 5154 5155 if (dma_mapping_error(dev, adapter->ip_offload_tok)) { 5156 if (!firmware_has_feature(FW_FEATURE_CMO)) 5157 dev_err(dev, "Couldn't map offload buffer\n"); 5158 return; 5159 } 5160 5161 memset(&crq, 0, sizeof(crq)); 5162 crq.query_ip_offload.first = IBMVNIC_CRQ_CMD; 5163 crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD; 5164 crq.query_ip_offload.len = cpu_to_be32(buf_sz); 5165 crq.query_ip_offload.ioba = 5166 cpu_to_be32(adapter->ip_offload_tok); 5167 5168 ibmvnic_send_crq(adapter, &crq); 5169 } 5170 5171 static void send_control_ip_offload(struct ibmvnic_adapter *adapter) 5172 { 5173 struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl; 5174 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 5175 struct device *dev = &adapter->vdev->dev; 5176 netdev_features_t old_hw_features = 0; 5177 union ibmvnic_crq crq; 5178 5179 adapter->ip_offload_ctrl_tok = 5180 dma_map_single(dev, 5181 ctrl_buf, 5182 sizeof(adapter->ip_offload_ctrl), 5183 DMA_TO_DEVICE); 5184 5185 if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) { 5186 dev_err(dev, "Couldn't map ip offload control buffer\n"); 5187 return; 5188 } 5189 5190 ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 5191 ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB); 5192 ctrl_buf->ipv4_chksum = buf->ipv4_chksum; 5193 ctrl_buf->ipv6_chksum = buf->ipv6_chksum; 5194 ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum; 5195 ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum; 5196 ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum; 5197 ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum; 5198 ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4; 5199 ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6; 5200 5201 /* large_rx disabled for now, additional features needed */ 5202 ctrl_buf->large_rx_ipv4 = 0; 5203 ctrl_buf->large_rx_ipv6 = 0; 5204 5205 if (adapter->state != VNIC_PROBING) { 5206 old_hw_features = adapter->netdev->hw_features; 5207 adapter->netdev->hw_features = 0; 5208 } 5209 5210 adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO; 5211 5212 if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum) 5213 adapter->netdev->hw_features |= NETIF_F_IP_CSUM; 5214 5215 if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum) 5216 adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM; 5217 5218 if ((adapter->netdev->features & 5219 (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))) 5220 adapter->netdev->hw_features |= NETIF_F_RXCSUM; 5221 5222 if (buf->large_tx_ipv4) 5223 adapter->netdev->hw_features |= NETIF_F_TSO; 5224 if (buf->large_tx_ipv6) 5225 adapter->netdev->hw_features |= NETIF_F_TSO6; 5226 5227 if (adapter->state == VNIC_PROBING) { 5228 adapter->netdev->features |= adapter->netdev->hw_features; 5229 } else if (old_hw_features != adapter->netdev->hw_features) { 5230 netdev_features_t tmp = 0; 5231 5232 /* disable features no longer supported */ 5233 adapter->netdev->features &= adapter->netdev->hw_features; 5234 /* turn on features now supported if previously enabled */ 5235 tmp = (old_hw_features ^ adapter->netdev->hw_features) & 5236 adapter->netdev->hw_features; 5237 adapter->netdev->features |= 5238 tmp & adapter->netdev->wanted_features; 5239 } 5240 5241 memset(&crq, 0, sizeof(crq)); 5242 crq.control_ip_offload.first = IBMVNIC_CRQ_CMD; 5243 crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD; 5244 crq.control_ip_offload.len = 5245 cpu_to_be32(sizeof(adapter->ip_offload_ctrl)); 5246 crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok); 5247 ibmvnic_send_crq(adapter, &crq); 5248 } 5249 5250 static void handle_vpd_size_rsp(union ibmvnic_crq *crq, 5251 struct ibmvnic_adapter *adapter) 5252 { 5253 struct device *dev = &adapter->vdev->dev; 5254 5255 if (crq->get_vpd_size_rsp.rc.code) { 5256 dev_err(dev, "Error retrieving VPD size, rc=%x\n", 5257 crq->get_vpd_size_rsp.rc.code); 5258 complete(&adapter->fw_done); 5259 return; 5260 } 5261 5262 adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len); 5263 complete(&adapter->fw_done); 5264 } 5265 5266 static void handle_vpd_rsp(union ibmvnic_crq *crq, 5267 struct ibmvnic_adapter *adapter) 5268 { 5269 struct device *dev = &adapter->vdev->dev; 5270 unsigned char *substr = NULL; 5271 u8 fw_level_len = 0; 5272 5273 memset(adapter->fw_version, 0, 32); 5274 5275 dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len, 5276 DMA_FROM_DEVICE); 5277 5278 if (crq->get_vpd_rsp.rc.code) { 5279 dev_err(dev, "Error retrieving VPD from device, rc=%x\n", 5280 crq->get_vpd_rsp.rc.code); 5281 goto complete; 5282 } 5283 5284 /* get the position of the firmware version info 5285 * located after the ASCII 'RM' substring in the buffer 5286 */ 5287 substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len); 5288 if (!substr) { 5289 dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n"); 5290 goto complete; 5291 } 5292 5293 /* get length of firmware level ASCII substring */ 5294 if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) { 5295 fw_level_len = *(substr + 2); 5296 } else { 5297 dev_info(dev, "Length of FW substr extrapolated VDP buff\n"); 5298 goto complete; 5299 } 5300 5301 /* copy firmware version string from vpd into adapter */ 5302 if ((substr + 3 + fw_level_len) < 5303 (adapter->vpd->buff + adapter->vpd->len)) { 5304 strscpy(adapter->fw_version, substr + 3, 5305 sizeof(adapter->fw_version)); 5306 } else { 5307 dev_info(dev, "FW substr extrapolated VPD buff\n"); 5308 } 5309 5310 complete: 5311 if (adapter->fw_version[0] == '\0') 5312 strscpy((char *)adapter->fw_version, "N/A", sizeof(adapter->fw_version)); 5313 complete(&adapter->fw_done); 5314 } 5315 5316 static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) 5317 { 5318 struct device *dev = &adapter->vdev->dev; 5319 struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; 5320 int i; 5321 5322 dma_unmap_single(dev, adapter->ip_offload_tok, 5323 sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); 5324 5325 netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); 5326 for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) 5327 netdev_dbg(adapter->netdev, "%016lx\n", 5328 ((unsigned long *)(buf))[i]); 5329 5330 netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); 5331 netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); 5332 netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n", 5333 buf->tcp_ipv4_chksum); 5334 netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n", 5335 buf->tcp_ipv6_chksum); 5336 netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n", 5337 buf->udp_ipv4_chksum); 5338 netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n", 5339 buf->udp_ipv6_chksum); 5340 netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n", 5341 buf->large_tx_ipv4); 5342 netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n", 5343 buf->large_tx_ipv6); 5344 netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n", 5345 buf->large_rx_ipv4); 5346 netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n", 5347 buf->large_rx_ipv6); 5348 netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n", 5349 buf->max_ipv4_header_size); 5350 netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n", 5351 buf->max_ipv6_header_size); 5352 netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n", 5353 buf->max_tcp_header_size); 5354 netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n", 5355 buf->max_udp_header_size); 5356 netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n", 5357 buf->max_large_tx_size); 5358 netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n", 5359 buf->max_large_rx_size); 5360 netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n", 5361 buf->ipv6_extension_header); 5362 netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n", 5363 buf->tcp_pseudosum_req); 5364 netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n", 5365 buf->num_ipv6_ext_headers); 5366 netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n", 5367 buf->off_ipv6_ext_headers); 5368 5369 send_control_ip_offload(adapter); 5370 } 5371 5372 static const char *ibmvnic_fw_err_cause(u16 cause) 5373 { 5374 switch (cause) { 5375 case ADAPTER_PROBLEM: 5376 return "adapter problem"; 5377 case BUS_PROBLEM: 5378 return "bus problem"; 5379 case FW_PROBLEM: 5380 return "firmware problem"; 5381 case DD_PROBLEM: 5382 return "device driver problem"; 5383 case EEH_RECOVERY: 5384 return "EEH recovery"; 5385 case FW_UPDATED: 5386 return "firmware updated"; 5387 case LOW_MEMORY: 5388 return "low Memory"; 5389 default: 5390 return "unknown"; 5391 } 5392 } 5393 5394 static void handle_error_indication(union ibmvnic_crq *crq, 5395 struct ibmvnic_adapter *adapter) 5396 { 5397 struct device *dev = &adapter->vdev->dev; 5398 u16 cause; 5399 5400 cause = be16_to_cpu(crq->error_indication.error_cause); 5401 5402 dev_warn_ratelimited(dev, 5403 "Firmware reports %serror, cause: %s. Starting recovery...\n", 5404 crq->error_indication.flags 5405 & IBMVNIC_FATAL_ERROR ? "FATAL " : "", 5406 ibmvnic_fw_err_cause(cause)); 5407 5408 if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR) 5409 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5410 else 5411 ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL); 5412 } 5413 5414 static int handle_change_mac_rsp(union ibmvnic_crq *crq, 5415 struct ibmvnic_adapter *adapter) 5416 { 5417 struct net_device *netdev = adapter->netdev; 5418 struct device *dev = &adapter->vdev->dev; 5419 long rc; 5420 5421 rc = crq->change_mac_addr_rsp.rc.code; 5422 if (rc) { 5423 dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc); 5424 goto out; 5425 } 5426 /* crq->change_mac_addr.mac_addr is the requested one 5427 * crq->change_mac_addr_rsp.mac_addr is the returned valid one. 5428 */ 5429 eth_hw_addr_set(netdev, &crq->change_mac_addr_rsp.mac_addr[0]); 5430 ether_addr_copy(adapter->mac_addr, 5431 &crq->change_mac_addr_rsp.mac_addr[0]); 5432 out: 5433 complete(&adapter->fw_done); 5434 return rc; 5435 } 5436 5437 static void handle_request_cap_rsp(union ibmvnic_crq *crq, 5438 struct ibmvnic_adapter *adapter) 5439 { 5440 struct device *dev = &adapter->vdev->dev; 5441 u64 *req_value; 5442 char *name; 5443 5444 atomic_dec(&adapter->running_cap_crqs); 5445 netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n", 5446 atomic_read(&adapter->running_cap_crqs)); 5447 switch (be16_to_cpu(crq->request_capability_rsp.capability)) { 5448 case REQ_TX_QUEUES: 5449 req_value = &adapter->req_tx_queues; 5450 name = "tx"; 5451 break; 5452 case REQ_RX_QUEUES: 5453 req_value = &adapter->req_rx_queues; 5454 name = "rx"; 5455 break; 5456 case REQ_RX_ADD_QUEUES: 5457 req_value = &adapter->req_rx_add_queues; 5458 name = "rx_add"; 5459 break; 5460 case REQ_TX_ENTRIES_PER_SUBCRQ: 5461 req_value = &adapter->req_tx_entries_per_subcrq; 5462 name = "tx_entries_per_subcrq"; 5463 break; 5464 case REQ_RX_ADD_ENTRIES_PER_SUBCRQ: 5465 req_value = &adapter->req_rx_add_entries_per_subcrq; 5466 name = "rx_add_entries_per_subcrq"; 5467 break; 5468 case REQ_MTU: 5469 req_value = &adapter->req_mtu; 5470 name = "mtu"; 5471 break; 5472 case PROMISC_REQUESTED: 5473 req_value = &adapter->promisc; 5474 name = "promisc"; 5475 break; 5476 default: 5477 dev_err(dev, "Got invalid cap request rsp %d\n", 5478 crq->request_capability.capability); 5479 return; 5480 } 5481 5482 switch (crq->request_capability_rsp.rc.code) { 5483 case SUCCESS: 5484 break; 5485 case PARTIALSUCCESS: 5486 dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n", 5487 *req_value, 5488 (long)be64_to_cpu(crq->request_capability_rsp.number), 5489 name); 5490 5491 if (be16_to_cpu(crq->request_capability_rsp.capability) == 5492 REQ_MTU) { 5493 pr_err("mtu of %llu is not supported. Reverting.\n", 5494 *req_value); 5495 *req_value = adapter->fallback.mtu; 5496 } else { 5497 *req_value = 5498 be64_to_cpu(crq->request_capability_rsp.number); 5499 } 5500 5501 send_request_cap(adapter, 1); 5502 return; 5503 default: 5504 dev_err(dev, "Error %d in request cap rsp\n", 5505 crq->request_capability_rsp.rc.code); 5506 return; 5507 } 5508 5509 /* Done receiving requested capabilities, query IP offload support */ 5510 if (atomic_read(&adapter->running_cap_crqs) == 0) 5511 send_query_ip_offload(adapter); 5512 } 5513 5514 static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, 5515 struct ibmvnic_adapter *adapter) 5516 { 5517 struct device *dev = &adapter->vdev->dev; 5518 struct net_device *netdev = adapter->netdev; 5519 struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; 5520 struct ibmvnic_login_buffer *login = adapter->login_buf; 5521 u64 *tx_handle_array; 5522 u64 *rx_handle_array; 5523 int num_tx_pools; 5524 int num_rx_pools; 5525 u64 *size_array; 5526 u32 rsp_len; 5527 int i; 5528 5529 /* CHECK: Test/set of login_pending does not need to be atomic 5530 * because only ibmvnic_tasklet tests/clears this. 5531 */ 5532 if (!adapter->login_pending) { 5533 netdev_warn(netdev, "Ignoring unexpected login response\n"); 5534 return 0; 5535 } 5536 adapter->login_pending = false; 5537 5538 /* If the number of queues requested can't be allocated by the 5539 * server, the login response will return with code 1. We will need 5540 * to resend the login buffer with fewer queues requested. 5541 */ 5542 if (login_rsp_crq->generic.rc.code) { 5543 adapter->init_done_rc = login_rsp_crq->generic.rc.code; 5544 complete(&adapter->init_done); 5545 return 0; 5546 } 5547 5548 if (adapter->failover_pending) { 5549 adapter->init_done_rc = -EAGAIN; 5550 netdev_dbg(netdev, "Failover pending, ignoring login response\n"); 5551 complete(&adapter->init_done); 5552 /* login response buffer will be released on reset */ 5553 return 0; 5554 } 5555 5556 netdev->mtu = adapter->req_mtu - ETH_HLEN; 5557 5558 netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); 5559 for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { 5560 netdev_dbg(adapter->netdev, "%016lx\n", 5561 ((unsigned long *)(adapter->login_rsp_buf))[i]); 5562 } 5563 5564 /* Sanity checks */ 5565 if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs || 5566 (be32_to_cpu(login->num_rxcomp_subcrqs) * 5567 adapter->req_rx_add_queues != 5568 be32_to_cpu(login_rsp->num_rxadd_subcrqs))) { 5569 dev_err(dev, "FATAL: Inconsistent login and login rsp\n"); 5570 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5571 return -EIO; 5572 } 5573 5574 rsp_len = be32_to_cpu(login_rsp->len); 5575 if (be32_to_cpu(login->login_rsp_len) < rsp_len || 5576 rsp_len <= be32_to_cpu(login_rsp->off_txsubm_subcrqs) || 5577 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_subcrqs) || 5578 rsp_len <= be32_to_cpu(login_rsp->off_rxadd_buff_size) || 5579 rsp_len <= be32_to_cpu(login_rsp->off_supp_tx_desc)) { 5580 /* This can happen if a login request times out and there are 5581 * 2 outstanding login requests sent, the LOGIN_RSP crq 5582 * could have been for the older login request. So we are 5583 * parsing the newer response buffer which may be incomplete 5584 */ 5585 dev_err(dev, "FATAL: Login rsp offsets/lengths invalid\n"); 5586 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 5587 return -EIO; 5588 } 5589 5590 size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5591 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size)); 5592 /* variable buffer sizes are not supported, so just read the 5593 * first entry. 5594 */ 5595 adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]); 5596 5597 num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); 5598 num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); 5599 5600 tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5601 be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs)); 5602 rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) + 5603 be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs)); 5604 5605 for (i = 0; i < num_tx_pools; i++) 5606 adapter->tx_scrq[i]->handle = tx_handle_array[i]; 5607 5608 for (i = 0; i < num_rx_pools; i++) 5609 adapter->rx_scrq[i]->handle = rx_handle_array[i]; 5610 5611 adapter->num_active_tx_scrqs = num_tx_pools; 5612 adapter->num_active_rx_scrqs = num_rx_pools; 5613 release_login_rsp_buffer(adapter); 5614 release_login_buffer(adapter); 5615 complete(&adapter->init_done); 5616 5617 return 0; 5618 } 5619 5620 static void handle_request_unmap_rsp(union ibmvnic_crq *crq, 5621 struct ibmvnic_adapter *adapter) 5622 { 5623 struct device *dev = &adapter->vdev->dev; 5624 long rc; 5625 5626 rc = crq->request_unmap_rsp.rc.code; 5627 if (rc) 5628 dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc); 5629 } 5630 5631 static void handle_query_map_rsp(union ibmvnic_crq *crq, 5632 struct ibmvnic_adapter *adapter) 5633 { 5634 struct net_device *netdev = adapter->netdev; 5635 struct device *dev = &adapter->vdev->dev; 5636 long rc; 5637 5638 rc = crq->query_map_rsp.rc.code; 5639 if (rc) { 5640 dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc); 5641 return; 5642 } 5643 netdev_dbg(netdev, "page_size = %d\ntot_pages = %u\nfree_pages = %u\n", 5644 crq->query_map_rsp.page_size, 5645 __be32_to_cpu(crq->query_map_rsp.tot_pages), 5646 __be32_to_cpu(crq->query_map_rsp.free_pages)); 5647 } 5648 5649 static void handle_query_cap_rsp(union ibmvnic_crq *crq, 5650 struct ibmvnic_adapter *adapter) 5651 { 5652 struct net_device *netdev = adapter->netdev; 5653 struct device *dev = &adapter->vdev->dev; 5654 long rc; 5655 5656 atomic_dec(&adapter->running_cap_crqs); 5657 netdev_dbg(netdev, "Outstanding queries: %d\n", 5658 atomic_read(&adapter->running_cap_crqs)); 5659 rc = crq->query_capability.rc.code; 5660 if (rc) { 5661 dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc); 5662 goto out; 5663 } 5664 5665 switch (be16_to_cpu(crq->query_capability.capability)) { 5666 case MIN_TX_QUEUES: 5667 adapter->min_tx_queues = 5668 be64_to_cpu(crq->query_capability.number); 5669 netdev_dbg(netdev, "min_tx_queues = %lld\n", 5670 adapter->min_tx_queues); 5671 break; 5672 case MIN_RX_QUEUES: 5673 adapter->min_rx_queues = 5674 be64_to_cpu(crq->query_capability.number); 5675 netdev_dbg(netdev, "min_rx_queues = %lld\n", 5676 adapter->min_rx_queues); 5677 break; 5678 case MIN_RX_ADD_QUEUES: 5679 adapter->min_rx_add_queues = 5680 be64_to_cpu(crq->query_capability.number); 5681 netdev_dbg(netdev, "min_rx_add_queues = %lld\n", 5682 adapter->min_rx_add_queues); 5683 break; 5684 case MAX_TX_QUEUES: 5685 adapter->max_tx_queues = 5686 be64_to_cpu(crq->query_capability.number); 5687 netdev_dbg(netdev, "max_tx_queues = %lld\n", 5688 adapter->max_tx_queues); 5689 break; 5690 case MAX_RX_QUEUES: 5691 adapter->max_rx_queues = 5692 be64_to_cpu(crq->query_capability.number); 5693 netdev_dbg(netdev, "max_rx_queues = %lld\n", 5694 adapter->max_rx_queues); 5695 break; 5696 case MAX_RX_ADD_QUEUES: 5697 adapter->max_rx_add_queues = 5698 be64_to_cpu(crq->query_capability.number); 5699 netdev_dbg(netdev, "max_rx_add_queues = %lld\n", 5700 adapter->max_rx_add_queues); 5701 break; 5702 case MIN_TX_ENTRIES_PER_SUBCRQ: 5703 adapter->min_tx_entries_per_subcrq = 5704 be64_to_cpu(crq->query_capability.number); 5705 netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n", 5706 adapter->min_tx_entries_per_subcrq); 5707 break; 5708 case MIN_RX_ADD_ENTRIES_PER_SUBCRQ: 5709 adapter->min_rx_add_entries_per_subcrq = 5710 be64_to_cpu(crq->query_capability.number); 5711 netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n", 5712 adapter->min_rx_add_entries_per_subcrq); 5713 break; 5714 case MAX_TX_ENTRIES_PER_SUBCRQ: 5715 adapter->max_tx_entries_per_subcrq = 5716 be64_to_cpu(crq->query_capability.number); 5717 netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n", 5718 adapter->max_tx_entries_per_subcrq); 5719 break; 5720 case MAX_RX_ADD_ENTRIES_PER_SUBCRQ: 5721 adapter->max_rx_add_entries_per_subcrq = 5722 be64_to_cpu(crq->query_capability.number); 5723 netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n", 5724 adapter->max_rx_add_entries_per_subcrq); 5725 break; 5726 case TCP_IP_OFFLOAD: 5727 adapter->tcp_ip_offload = 5728 be64_to_cpu(crq->query_capability.number); 5729 netdev_dbg(netdev, "tcp_ip_offload = %lld\n", 5730 adapter->tcp_ip_offload); 5731 break; 5732 case PROMISC_SUPPORTED: 5733 adapter->promisc_supported = 5734 be64_to_cpu(crq->query_capability.number); 5735 netdev_dbg(netdev, "promisc_supported = %lld\n", 5736 adapter->promisc_supported); 5737 break; 5738 case MIN_MTU: 5739 adapter->min_mtu = be64_to_cpu(crq->query_capability.number); 5740 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 5741 netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu); 5742 break; 5743 case MAX_MTU: 5744 adapter->max_mtu = be64_to_cpu(crq->query_capability.number); 5745 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 5746 netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu); 5747 break; 5748 case MAX_MULTICAST_FILTERS: 5749 adapter->max_multicast_filters = 5750 be64_to_cpu(crq->query_capability.number); 5751 netdev_dbg(netdev, "max_multicast_filters = %lld\n", 5752 adapter->max_multicast_filters); 5753 break; 5754 case VLAN_HEADER_INSERTION: 5755 adapter->vlan_header_insertion = 5756 be64_to_cpu(crq->query_capability.number); 5757 if (adapter->vlan_header_insertion) 5758 netdev->features |= NETIF_F_HW_VLAN_STAG_TX; 5759 netdev_dbg(netdev, "vlan_header_insertion = %lld\n", 5760 adapter->vlan_header_insertion); 5761 break; 5762 case RX_VLAN_HEADER_INSERTION: 5763 adapter->rx_vlan_header_insertion = 5764 be64_to_cpu(crq->query_capability.number); 5765 netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n", 5766 adapter->rx_vlan_header_insertion); 5767 break; 5768 case MAX_TX_SG_ENTRIES: 5769 adapter->max_tx_sg_entries = 5770 be64_to_cpu(crq->query_capability.number); 5771 netdev_dbg(netdev, "max_tx_sg_entries = %lld\n", 5772 adapter->max_tx_sg_entries); 5773 break; 5774 case RX_SG_SUPPORTED: 5775 adapter->rx_sg_supported = 5776 be64_to_cpu(crq->query_capability.number); 5777 netdev_dbg(netdev, "rx_sg_supported = %lld\n", 5778 adapter->rx_sg_supported); 5779 break; 5780 case OPT_TX_COMP_SUB_QUEUES: 5781 adapter->opt_tx_comp_sub_queues = 5782 be64_to_cpu(crq->query_capability.number); 5783 netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n", 5784 adapter->opt_tx_comp_sub_queues); 5785 break; 5786 case OPT_RX_COMP_QUEUES: 5787 adapter->opt_rx_comp_queues = 5788 be64_to_cpu(crq->query_capability.number); 5789 netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n", 5790 adapter->opt_rx_comp_queues); 5791 break; 5792 case OPT_RX_BUFADD_Q_PER_RX_COMP_Q: 5793 adapter->opt_rx_bufadd_q_per_rx_comp_q = 5794 be64_to_cpu(crq->query_capability.number); 5795 netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n", 5796 adapter->opt_rx_bufadd_q_per_rx_comp_q); 5797 break; 5798 case OPT_TX_ENTRIES_PER_SUBCRQ: 5799 adapter->opt_tx_entries_per_subcrq = 5800 be64_to_cpu(crq->query_capability.number); 5801 netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n", 5802 adapter->opt_tx_entries_per_subcrq); 5803 break; 5804 case OPT_RXBA_ENTRIES_PER_SUBCRQ: 5805 adapter->opt_rxba_entries_per_subcrq = 5806 be64_to_cpu(crq->query_capability.number); 5807 netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n", 5808 adapter->opt_rxba_entries_per_subcrq); 5809 break; 5810 case TX_RX_DESC_REQ: 5811 adapter->tx_rx_desc_req = crq->query_capability.number; 5812 netdev_dbg(netdev, "tx_rx_desc_req = %llx\n", 5813 adapter->tx_rx_desc_req); 5814 break; 5815 5816 default: 5817 netdev_err(netdev, "Got invalid cap rsp %d\n", 5818 crq->query_capability.capability); 5819 } 5820 5821 out: 5822 if (atomic_read(&adapter->running_cap_crqs) == 0) 5823 send_request_cap(adapter, 0); 5824 } 5825 5826 static int send_query_phys_parms(struct ibmvnic_adapter *adapter) 5827 { 5828 union ibmvnic_crq crq; 5829 int rc; 5830 5831 memset(&crq, 0, sizeof(crq)); 5832 crq.query_phys_parms.first = IBMVNIC_CRQ_CMD; 5833 crq.query_phys_parms.cmd = QUERY_PHYS_PARMS; 5834 5835 mutex_lock(&adapter->fw_lock); 5836 adapter->fw_done_rc = 0; 5837 reinit_completion(&adapter->fw_done); 5838 5839 rc = ibmvnic_send_crq(adapter, &crq); 5840 if (rc) { 5841 mutex_unlock(&adapter->fw_lock); 5842 return rc; 5843 } 5844 5845 rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000); 5846 if (rc) { 5847 mutex_unlock(&adapter->fw_lock); 5848 return rc; 5849 } 5850 5851 mutex_unlock(&adapter->fw_lock); 5852 return adapter->fw_done_rc ? -EIO : 0; 5853 } 5854 5855 static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq, 5856 struct ibmvnic_adapter *adapter) 5857 { 5858 struct net_device *netdev = adapter->netdev; 5859 int rc; 5860 __be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed); 5861 5862 rc = crq->query_phys_parms_rsp.rc.code; 5863 if (rc) { 5864 netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc); 5865 return rc; 5866 } 5867 switch (rspeed) { 5868 case IBMVNIC_10MBPS: 5869 adapter->speed = SPEED_10; 5870 break; 5871 case IBMVNIC_100MBPS: 5872 adapter->speed = SPEED_100; 5873 break; 5874 case IBMVNIC_1GBPS: 5875 adapter->speed = SPEED_1000; 5876 break; 5877 case IBMVNIC_10GBPS: 5878 adapter->speed = SPEED_10000; 5879 break; 5880 case IBMVNIC_25GBPS: 5881 adapter->speed = SPEED_25000; 5882 break; 5883 case IBMVNIC_40GBPS: 5884 adapter->speed = SPEED_40000; 5885 break; 5886 case IBMVNIC_50GBPS: 5887 adapter->speed = SPEED_50000; 5888 break; 5889 case IBMVNIC_100GBPS: 5890 adapter->speed = SPEED_100000; 5891 break; 5892 case IBMVNIC_200GBPS: 5893 adapter->speed = SPEED_200000; 5894 break; 5895 default: 5896 if (netif_carrier_ok(netdev)) 5897 netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed); 5898 adapter->speed = SPEED_UNKNOWN; 5899 } 5900 if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX) 5901 adapter->duplex = DUPLEX_FULL; 5902 else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX) 5903 adapter->duplex = DUPLEX_HALF; 5904 else 5905 adapter->duplex = DUPLEX_UNKNOWN; 5906 5907 return rc; 5908 } 5909 5910 static void ibmvnic_handle_crq(union ibmvnic_crq *crq, 5911 struct ibmvnic_adapter *adapter) 5912 { 5913 struct ibmvnic_generic_crq *gen_crq = &crq->generic; 5914 struct net_device *netdev = adapter->netdev; 5915 struct device *dev = &adapter->vdev->dev; 5916 u64 *u64_crq = (u64 *)crq; 5917 long rc; 5918 5919 netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n", 5920 (unsigned long)cpu_to_be64(u64_crq[0]), 5921 (unsigned long)cpu_to_be64(u64_crq[1])); 5922 switch (gen_crq->first) { 5923 case IBMVNIC_CRQ_INIT_RSP: 5924 switch (gen_crq->cmd) { 5925 case IBMVNIC_CRQ_INIT: 5926 dev_info(dev, "Partner initialized\n"); 5927 adapter->from_passive_init = true; 5928 /* Discard any stale login responses from prev reset. 5929 * CHECK: should we clear even on INIT_COMPLETE? 5930 */ 5931 adapter->login_pending = false; 5932 5933 if (adapter->state == VNIC_DOWN) 5934 rc = ibmvnic_reset(adapter, VNIC_RESET_PASSIVE_INIT); 5935 else 5936 rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 5937 5938 if (rc && rc != -EBUSY) { 5939 /* We were unable to schedule the failover 5940 * reset either because the adapter was still 5941 * probing (eg: during kexec) or we could not 5942 * allocate memory. Clear the failover_pending 5943 * flag since no one else will. We ignore 5944 * EBUSY because it means either FAILOVER reset 5945 * is already scheduled or the adapter is 5946 * being removed. 5947 */ 5948 netdev_err(netdev, 5949 "Error %ld scheduling failover reset\n", 5950 rc); 5951 adapter->failover_pending = false; 5952 } 5953 5954 if (!completion_done(&adapter->init_done)) { 5955 if (!adapter->init_done_rc) 5956 adapter->init_done_rc = -EAGAIN; 5957 complete(&adapter->init_done); 5958 } 5959 5960 break; 5961 case IBMVNIC_CRQ_INIT_COMPLETE: 5962 dev_info(dev, "Partner initialization complete\n"); 5963 adapter->crq.active = true; 5964 send_version_xchg(adapter); 5965 break; 5966 default: 5967 dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd); 5968 } 5969 return; 5970 case IBMVNIC_CRQ_XPORT_EVENT: 5971 netif_carrier_off(netdev); 5972 adapter->crq.active = false; 5973 /* terminate any thread waiting for a response 5974 * from the device 5975 */ 5976 if (!completion_done(&adapter->fw_done)) { 5977 adapter->fw_done_rc = -EIO; 5978 complete(&adapter->fw_done); 5979 } 5980 5981 /* if we got here during crq-init, retry crq-init */ 5982 if (!completion_done(&adapter->init_done)) { 5983 adapter->init_done_rc = -EAGAIN; 5984 complete(&adapter->init_done); 5985 } 5986 5987 if (!completion_done(&adapter->stats_done)) 5988 complete(&adapter->stats_done); 5989 if (test_bit(0, &adapter->resetting)) 5990 adapter->force_reset_recovery = true; 5991 if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) { 5992 dev_info(dev, "Migrated, re-enabling adapter\n"); 5993 ibmvnic_reset(adapter, VNIC_RESET_MOBILITY); 5994 } else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) { 5995 dev_info(dev, "Backing device failover detected\n"); 5996 adapter->failover_pending = true; 5997 } else { 5998 /* The adapter lost the connection */ 5999 dev_err(dev, "Virtual Adapter failed (rc=%d)\n", 6000 gen_crq->cmd); 6001 ibmvnic_reset(adapter, VNIC_RESET_FATAL); 6002 } 6003 return; 6004 case IBMVNIC_CRQ_CMD_RSP: 6005 break; 6006 default: 6007 dev_err(dev, "Got an invalid msg type 0x%02x\n", 6008 gen_crq->first); 6009 return; 6010 } 6011 6012 switch (gen_crq->cmd) { 6013 case VERSION_EXCHANGE_RSP: 6014 rc = crq->version_exchange_rsp.rc.code; 6015 if (rc) { 6016 dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc); 6017 break; 6018 } 6019 ibmvnic_version = 6020 be16_to_cpu(crq->version_exchange_rsp.version); 6021 dev_info(dev, "Partner protocol version is %d\n", 6022 ibmvnic_version); 6023 send_query_cap(adapter); 6024 break; 6025 case QUERY_CAPABILITY_RSP: 6026 handle_query_cap_rsp(crq, adapter); 6027 break; 6028 case QUERY_MAP_RSP: 6029 handle_query_map_rsp(crq, adapter); 6030 break; 6031 case REQUEST_MAP_RSP: 6032 adapter->fw_done_rc = crq->request_map_rsp.rc.code; 6033 complete(&adapter->fw_done); 6034 break; 6035 case REQUEST_UNMAP_RSP: 6036 handle_request_unmap_rsp(crq, adapter); 6037 break; 6038 case REQUEST_CAPABILITY_RSP: 6039 handle_request_cap_rsp(crq, adapter); 6040 break; 6041 case LOGIN_RSP: 6042 netdev_dbg(netdev, "Got Login Response\n"); 6043 handle_login_rsp(crq, adapter); 6044 break; 6045 case LOGICAL_LINK_STATE_RSP: 6046 netdev_dbg(netdev, 6047 "Got Logical Link State Response, state: %d rc: %d\n", 6048 crq->logical_link_state_rsp.link_state, 6049 crq->logical_link_state_rsp.rc.code); 6050 adapter->logical_link_state = 6051 crq->logical_link_state_rsp.link_state; 6052 adapter->init_done_rc = crq->logical_link_state_rsp.rc.code; 6053 complete(&adapter->init_done); 6054 break; 6055 case LINK_STATE_INDICATION: 6056 netdev_dbg(netdev, "Got Logical Link State Indication\n"); 6057 adapter->phys_link_state = 6058 crq->link_state_indication.phys_link_state; 6059 adapter->logical_link_state = 6060 crq->link_state_indication.logical_link_state; 6061 if (adapter->phys_link_state && adapter->logical_link_state) 6062 netif_carrier_on(netdev); 6063 else 6064 netif_carrier_off(netdev); 6065 break; 6066 case CHANGE_MAC_ADDR_RSP: 6067 netdev_dbg(netdev, "Got MAC address change Response\n"); 6068 adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter); 6069 break; 6070 case ERROR_INDICATION: 6071 netdev_dbg(netdev, "Got Error Indication\n"); 6072 handle_error_indication(crq, adapter); 6073 break; 6074 case REQUEST_STATISTICS_RSP: 6075 netdev_dbg(netdev, "Got Statistics Response\n"); 6076 complete(&adapter->stats_done); 6077 break; 6078 case QUERY_IP_OFFLOAD_RSP: 6079 netdev_dbg(netdev, "Got Query IP offload Response\n"); 6080 handle_query_ip_offload_rsp(adapter); 6081 break; 6082 case MULTICAST_CTRL_RSP: 6083 netdev_dbg(netdev, "Got multicast control Response\n"); 6084 break; 6085 case CONTROL_IP_OFFLOAD_RSP: 6086 netdev_dbg(netdev, "Got Control IP offload Response\n"); 6087 dma_unmap_single(dev, adapter->ip_offload_ctrl_tok, 6088 sizeof(adapter->ip_offload_ctrl), 6089 DMA_TO_DEVICE); 6090 complete(&adapter->init_done); 6091 break; 6092 case COLLECT_FW_TRACE_RSP: 6093 netdev_dbg(netdev, "Got Collect firmware trace Response\n"); 6094 complete(&adapter->fw_done); 6095 break; 6096 case GET_VPD_SIZE_RSP: 6097 handle_vpd_size_rsp(crq, adapter); 6098 break; 6099 case GET_VPD_RSP: 6100 handle_vpd_rsp(crq, adapter); 6101 break; 6102 case QUERY_PHYS_PARMS_RSP: 6103 adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter); 6104 complete(&adapter->fw_done); 6105 break; 6106 default: 6107 netdev_err(netdev, "Got an invalid cmd type 0x%02x\n", 6108 gen_crq->cmd); 6109 } 6110 } 6111 6112 static irqreturn_t ibmvnic_interrupt(int irq, void *instance) 6113 { 6114 struct ibmvnic_adapter *adapter = instance; 6115 6116 tasklet_schedule(&adapter->tasklet); 6117 return IRQ_HANDLED; 6118 } 6119 6120 static void ibmvnic_tasklet(struct tasklet_struct *t) 6121 { 6122 struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet); 6123 struct ibmvnic_crq_queue *queue = &adapter->crq; 6124 union ibmvnic_crq *crq; 6125 unsigned long flags; 6126 6127 spin_lock_irqsave(&queue->lock, flags); 6128 6129 /* Pull all the valid messages off the CRQ */ 6130 while ((crq = ibmvnic_next_crq(adapter)) != NULL) { 6131 /* This barrier makes sure ibmvnic_next_crq()'s 6132 * crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded 6133 * before ibmvnic_handle_crq()'s 6134 * switch(gen_crq->first) and switch(gen_crq->cmd). 6135 */ 6136 dma_rmb(); 6137 ibmvnic_handle_crq(crq, adapter); 6138 crq->generic.first = 0; 6139 } 6140 6141 spin_unlock_irqrestore(&queue->lock, flags); 6142 } 6143 6144 static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter) 6145 { 6146 struct vio_dev *vdev = adapter->vdev; 6147 int rc; 6148 6149 do { 6150 rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); 6151 } while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6152 6153 if (rc) 6154 dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc); 6155 6156 return rc; 6157 } 6158 6159 static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter) 6160 { 6161 struct ibmvnic_crq_queue *crq = &adapter->crq; 6162 struct device *dev = &adapter->vdev->dev; 6163 struct vio_dev *vdev = adapter->vdev; 6164 int rc; 6165 6166 /* Close the CRQ */ 6167 do { 6168 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6169 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6170 6171 /* Clean out the queue */ 6172 if (!crq->msgs) 6173 return -EINVAL; 6174 6175 memset(crq->msgs, 0, PAGE_SIZE); 6176 crq->cur = 0; 6177 crq->active = false; 6178 6179 /* And re-open it again */ 6180 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 6181 crq->msg_token, PAGE_SIZE); 6182 6183 if (rc == H_CLOSED) 6184 /* Adapter is good, but other end is not ready */ 6185 dev_warn(dev, "Partner adapter not ready\n"); 6186 else if (rc != 0) 6187 dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc); 6188 6189 return rc; 6190 } 6191 6192 static void release_crq_queue(struct ibmvnic_adapter *adapter) 6193 { 6194 struct ibmvnic_crq_queue *crq = &adapter->crq; 6195 struct vio_dev *vdev = adapter->vdev; 6196 long rc; 6197 6198 if (!crq->msgs) 6199 return; 6200 6201 netdev_dbg(adapter->netdev, "Releasing CRQ\n"); 6202 free_irq(vdev->irq, adapter); 6203 tasklet_kill(&adapter->tasklet); 6204 do { 6205 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6206 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6207 6208 dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE, 6209 DMA_BIDIRECTIONAL); 6210 free_page((unsigned long)crq->msgs); 6211 crq->msgs = NULL; 6212 crq->active = false; 6213 } 6214 6215 static int init_crq_queue(struct ibmvnic_adapter *adapter) 6216 { 6217 struct ibmvnic_crq_queue *crq = &adapter->crq; 6218 struct device *dev = &adapter->vdev->dev; 6219 struct vio_dev *vdev = adapter->vdev; 6220 int rc, retrc = -ENOMEM; 6221 6222 if (crq->msgs) 6223 return 0; 6224 6225 crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL); 6226 /* Should we allocate more than one page? */ 6227 6228 if (!crq->msgs) 6229 return -ENOMEM; 6230 6231 crq->size = PAGE_SIZE / sizeof(*crq->msgs); 6232 crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE, 6233 DMA_BIDIRECTIONAL); 6234 if (dma_mapping_error(dev, crq->msg_token)) 6235 goto map_failed; 6236 6237 rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, 6238 crq->msg_token, PAGE_SIZE); 6239 6240 if (rc == H_RESOURCE) 6241 /* maybe kexecing and resource is busy. try a reset */ 6242 rc = ibmvnic_reset_crq(adapter); 6243 retrc = rc; 6244 6245 if (rc == H_CLOSED) { 6246 dev_warn(dev, "Partner adapter not ready\n"); 6247 } else if (rc) { 6248 dev_warn(dev, "Error %d opening adapter\n", rc); 6249 goto reg_crq_failed; 6250 } 6251 6252 retrc = 0; 6253 6254 tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet); 6255 6256 netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq); 6257 snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x", 6258 adapter->vdev->unit_address); 6259 rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter); 6260 if (rc) { 6261 dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n", 6262 vdev->irq, rc); 6263 goto req_irq_failed; 6264 } 6265 6266 rc = vio_enable_interrupts(vdev); 6267 if (rc) { 6268 dev_err(dev, "Error %d enabling interrupts\n", rc); 6269 goto req_irq_failed; 6270 } 6271 6272 crq->cur = 0; 6273 spin_lock_init(&crq->lock); 6274 6275 /* process any CRQs that were queued before we enabled interrupts */ 6276 tasklet_schedule(&adapter->tasklet); 6277 6278 return retrc; 6279 6280 req_irq_failed: 6281 tasklet_kill(&adapter->tasklet); 6282 do { 6283 rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address); 6284 } while (rc == H_BUSY || H_IS_LONG_BUSY(rc)); 6285 reg_crq_failed: 6286 dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL); 6287 map_failed: 6288 free_page((unsigned long)crq->msgs); 6289 crq->msgs = NULL; 6290 return retrc; 6291 } 6292 6293 static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset) 6294 { 6295 struct device *dev = &adapter->vdev->dev; 6296 unsigned long timeout = msecs_to_jiffies(20000); 6297 u64 old_num_rx_queues = adapter->req_rx_queues; 6298 u64 old_num_tx_queues = adapter->req_tx_queues; 6299 int rc; 6300 6301 adapter->from_passive_init = false; 6302 6303 rc = ibmvnic_send_crq_init(adapter); 6304 if (rc) { 6305 dev_err(dev, "Send crq init failed with error %d\n", rc); 6306 return rc; 6307 } 6308 6309 if (!wait_for_completion_timeout(&adapter->init_done, timeout)) { 6310 dev_err(dev, "Initialization sequence timed out\n"); 6311 return -ETIMEDOUT; 6312 } 6313 6314 if (adapter->init_done_rc) { 6315 release_crq_queue(adapter); 6316 dev_err(dev, "CRQ-init failed, %d\n", adapter->init_done_rc); 6317 return adapter->init_done_rc; 6318 } 6319 6320 if (adapter->from_passive_init) { 6321 adapter->state = VNIC_OPEN; 6322 adapter->from_passive_init = false; 6323 dev_err(dev, "CRQ-init failed, passive-init\n"); 6324 return -EINVAL; 6325 } 6326 6327 if (reset && 6328 test_bit(0, &adapter->resetting) && !adapter->wait_for_reset && 6329 adapter->reset_reason != VNIC_RESET_MOBILITY) { 6330 if (adapter->req_rx_queues != old_num_rx_queues || 6331 adapter->req_tx_queues != old_num_tx_queues) { 6332 release_sub_crqs(adapter, 0); 6333 rc = init_sub_crqs(adapter); 6334 } else { 6335 /* no need to reinitialize completely, but we do 6336 * need to clean up transmits that were in flight 6337 * when we processed the reset. Failure to do so 6338 * will confound the upper layer, usually TCP, by 6339 * creating the illusion of transmits that are 6340 * awaiting completion. 6341 */ 6342 clean_tx_pools(adapter); 6343 6344 rc = reset_sub_crq_queues(adapter); 6345 } 6346 } else { 6347 rc = init_sub_crqs(adapter); 6348 } 6349 6350 if (rc) { 6351 dev_err(dev, "Initialization of sub crqs failed\n"); 6352 release_crq_queue(adapter); 6353 return rc; 6354 } 6355 6356 rc = init_sub_crq_irqs(adapter); 6357 if (rc) { 6358 dev_err(dev, "Failed to initialize sub crq irqs\n"); 6359 release_crq_queue(adapter); 6360 } 6361 6362 return rc; 6363 } 6364 6365 static struct device_attribute dev_attr_failover; 6366 6367 static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id) 6368 { 6369 struct ibmvnic_adapter *adapter; 6370 struct net_device *netdev; 6371 unsigned char *mac_addr_p; 6372 unsigned long flags; 6373 bool init_success; 6374 int rc; 6375 6376 dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n", 6377 dev->unit_address); 6378 6379 mac_addr_p = (unsigned char *)vio_get_attribute(dev, 6380 VETH_MAC_ADDR, NULL); 6381 if (!mac_addr_p) { 6382 dev_err(&dev->dev, 6383 "(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n", 6384 __FILE__, __LINE__); 6385 return 0; 6386 } 6387 6388 netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter), 6389 IBMVNIC_MAX_QUEUES); 6390 if (!netdev) 6391 return -ENOMEM; 6392 6393 adapter = netdev_priv(netdev); 6394 adapter->state = VNIC_PROBING; 6395 dev_set_drvdata(&dev->dev, netdev); 6396 adapter->vdev = dev; 6397 adapter->netdev = netdev; 6398 adapter->login_pending = false; 6399 memset(&adapter->map_ids, 0, sizeof(adapter->map_ids)); 6400 /* map_ids start at 1, so ensure map_id 0 is always "in-use" */ 6401 bitmap_set(adapter->map_ids, 0, 1); 6402 6403 ether_addr_copy(adapter->mac_addr, mac_addr_p); 6404 eth_hw_addr_set(netdev, adapter->mac_addr); 6405 netdev->irq = dev->irq; 6406 netdev->netdev_ops = &ibmvnic_netdev_ops; 6407 netdev->ethtool_ops = &ibmvnic_ethtool_ops; 6408 SET_NETDEV_DEV(netdev, &dev->dev); 6409 6410 INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset); 6411 INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset, 6412 __ibmvnic_delayed_reset); 6413 INIT_LIST_HEAD(&adapter->rwi_list); 6414 spin_lock_init(&adapter->rwi_lock); 6415 spin_lock_init(&adapter->state_lock); 6416 mutex_init(&adapter->fw_lock); 6417 init_completion(&adapter->probe_done); 6418 init_completion(&adapter->init_done); 6419 init_completion(&adapter->fw_done); 6420 init_completion(&adapter->reset_done); 6421 init_completion(&adapter->stats_done); 6422 clear_bit(0, &adapter->resetting); 6423 adapter->prev_rx_buf_sz = 0; 6424 adapter->prev_mtu = 0; 6425 6426 init_success = false; 6427 do { 6428 reinit_init_done(adapter); 6429 6430 /* clear any failovers we got in the previous pass 6431 * since we are reinitializing the CRQ 6432 */ 6433 adapter->failover_pending = false; 6434 6435 /* If we had already initialized CRQ, we may have one or 6436 * more resets queued already. Discard those and release 6437 * the CRQ before initializing the CRQ again. 6438 */ 6439 release_crq_queue(adapter); 6440 6441 /* Since we are still in PROBING state, __ibmvnic_reset() 6442 * will not access the ->rwi_list and since we released CRQ, 6443 * we won't get _new_ transport events. But there maybe an 6444 * ongoing ibmvnic_reset() call. So serialize access to 6445 * rwi_list. If we win the race, ibvmnic_reset() could add 6446 * a reset after we purged but thats ok - we just may end 6447 * up with an extra reset (i.e similar to having two or more 6448 * resets in the queue at once). 6449 * CHECK. 6450 */ 6451 spin_lock_irqsave(&adapter->rwi_lock, flags); 6452 flush_reset_queue(adapter); 6453 spin_unlock_irqrestore(&adapter->rwi_lock, flags); 6454 6455 rc = init_crq_queue(adapter); 6456 if (rc) { 6457 dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n", 6458 rc); 6459 goto ibmvnic_init_fail; 6460 } 6461 6462 rc = ibmvnic_reset_init(adapter, false); 6463 } while (rc == -EAGAIN); 6464 6465 /* We are ignoring the error from ibmvnic_reset_init() assuming that the 6466 * partner is not ready. CRQ is not active. When the partner becomes 6467 * ready, we will do the passive init reset. 6468 */ 6469 6470 if (!rc) 6471 init_success = true; 6472 6473 rc = init_stats_buffers(adapter); 6474 if (rc) 6475 goto ibmvnic_init_fail; 6476 6477 rc = init_stats_token(adapter); 6478 if (rc) 6479 goto ibmvnic_stats_fail; 6480 6481 rc = device_create_file(&dev->dev, &dev_attr_failover); 6482 if (rc) 6483 goto ibmvnic_dev_file_err; 6484 6485 netif_carrier_off(netdev); 6486 6487 if (init_success) { 6488 adapter->state = VNIC_PROBED; 6489 netdev->mtu = adapter->req_mtu - ETH_HLEN; 6490 netdev->min_mtu = adapter->min_mtu - ETH_HLEN; 6491 netdev->max_mtu = adapter->max_mtu - ETH_HLEN; 6492 } else { 6493 adapter->state = VNIC_DOWN; 6494 } 6495 6496 adapter->wait_for_reset = false; 6497 adapter->last_reset_time = jiffies; 6498 6499 rc = register_netdev(netdev); 6500 if (rc) { 6501 dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc); 6502 goto ibmvnic_register_fail; 6503 } 6504 dev_info(&dev->dev, "ibmvnic registered\n"); 6505 6506 rc = ibmvnic_cpu_notif_add(adapter); 6507 if (rc) { 6508 netdev_err(netdev, "Registering cpu notifier failed\n"); 6509 goto cpu_notif_add_failed; 6510 } 6511 6512 complete(&adapter->probe_done); 6513 6514 return 0; 6515 6516 cpu_notif_add_failed: 6517 unregister_netdev(netdev); 6518 6519 ibmvnic_register_fail: 6520 device_remove_file(&dev->dev, &dev_attr_failover); 6521 6522 ibmvnic_dev_file_err: 6523 release_stats_token(adapter); 6524 6525 ibmvnic_stats_fail: 6526 release_stats_buffers(adapter); 6527 6528 ibmvnic_init_fail: 6529 release_sub_crqs(adapter, 1); 6530 release_crq_queue(adapter); 6531 6532 /* cleanup worker thread after releasing CRQ so we don't get 6533 * transport events (i.e new work items for the worker thread). 6534 */ 6535 adapter->state = VNIC_REMOVING; 6536 complete(&adapter->probe_done); 6537 flush_work(&adapter->ibmvnic_reset); 6538 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6539 6540 flush_reset_queue(adapter); 6541 6542 mutex_destroy(&adapter->fw_lock); 6543 free_netdev(netdev); 6544 6545 return rc; 6546 } 6547 6548 static void ibmvnic_remove(struct vio_dev *dev) 6549 { 6550 struct net_device *netdev = dev_get_drvdata(&dev->dev); 6551 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6552 unsigned long flags; 6553 6554 spin_lock_irqsave(&adapter->state_lock, flags); 6555 6556 /* If ibmvnic_reset() is scheduling a reset, wait for it to 6557 * finish. Then, set the state to REMOVING to prevent it from 6558 * scheduling any more work and to have reset functions ignore 6559 * any resets that have already been scheduled. Drop the lock 6560 * after setting state, so __ibmvnic_reset() which is called 6561 * from the flush_work() below, can make progress. 6562 */ 6563 spin_lock(&adapter->rwi_lock); 6564 adapter->state = VNIC_REMOVING; 6565 spin_unlock(&adapter->rwi_lock); 6566 6567 spin_unlock_irqrestore(&adapter->state_lock, flags); 6568 6569 ibmvnic_cpu_notif_remove(adapter); 6570 6571 flush_work(&adapter->ibmvnic_reset); 6572 flush_delayed_work(&adapter->ibmvnic_delayed_reset); 6573 6574 rtnl_lock(); 6575 unregister_netdevice(netdev); 6576 6577 release_resources(adapter); 6578 release_rx_pools(adapter); 6579 release_tx_pools(adapter); 6580 release_sub_crqs(adapter, 1); 6581 release_crq_queue(adapter); 6582 6583 release_stats_token(adapter); 6584 release_stats_buffers(adapter); 6585 6586 adapter->state = VNIC_REMOVED; 6587 6588 rtnl_unlock(); 6589 mutex_destroy(&adapter->fw_lock); 6590 device_remove_file(&dev->dev, &dev_attr_failover); 6591 free_netdev(netdev); 6592 dev_set_drvdata(&dev->dev, NULL); 6593 } 6594 6595 static ssize_t failover_store(struct device *dev, struct device_attribute *attr, 6596 const char *buf, size_t count) 6597 { 6598 struct net_device *netdev = dev_get_drvdata(dev); 6599 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6600 unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; 6601 __be64 session_token; 6602 long rc; 6603 6604 if (!sysfs_streq(buf, "1")) 6605 return -EINVAL; 6606 6607 rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address, 6608 H_GET_SESSION_TOKEN, 0, 0, 0); 6609 if (rc) { 6610 netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n", 6611 rc); 6612 goto last_resort; 6613 } 6614 6615 session_token = (__be64)retbuf[0]; 6616 netdev_dbg(netdev, "Initiating client failover, session id %llx\n", 6617 be64_to_cpu(session_token)); 6618 rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address, 6619 H_SESSION_ERR_DETECTED, session_token, 0, 0); 6620 if (rc) { 6621 netdev_err(netdev, 6622 "H_VIOCTL initiated failover failed, rc %ld\n", 6623 rc); 6624 goto last_resort; 6625 } 6626 6627 return count; 6628 6629 last_resort: 6630 netdev_dbg(netdev, "Trying to send CRQ_CMD, the last resort\n"); 6631 ibmvnic_reset(adapter, VNIC_RESET_FAILOVER); 6632 6633 return count; 6634 } 6635 static DEVICE_ATTR_WO(failover); 6636 6637 static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev) 6638 { 6639 struct net_device *netdev = dev_get_drvdata(&vdev->dev); 6640 struct ibmvnic_adapter *adapter; 6641 struct iommu_table *tbl; 6642 unsigned long ret = 0; 6643 int i; 6644 6645 tbl = get_iommu_table_base(&vdev->dev); 6646 6647 /* netdev inits at probe time along with the structures we need below*/ 6648 if (!netdev) 6649 return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl); 6650 6651 adapter = netdev_priv(netdev); 6652 6653 ret += PAGE_SIZE; /* the crq message queue */ 6654 ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl); 6655 6656 for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++) 6657 ret += 4 * PAGE_SIZE; /* the scrq message queue */ 6658 6659 for (i = 0; i < adapter->num_active_rx_pools; i++) 6660 ret += adapter->rx_pool[i].size * 6661 IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl); 6662 6663 return ret; 6664 } 6665 6666 static int ibmvnic_resume(struct device *dev) 6667 { 6668 struct net_device *netdev = dev_get_drvdata(dev); 6669 struct ibmvnic_adapter *adapter = netdev_priv(netdev); 6670 6671 if (adapter->state != VNIC_OPEN) 6672 return 0; 6673 6674 tasklet_schedule(&adapter->tasklet); 6675 6676 return 0; 6677 } 6678 6679 static const struct vio_device_id ibmvnic_device_table[] = { 6680 {"network", "IBM,vnic"}, 6681 {"", "" } 6682 }; 6683 MODULE_DEVICE_TABLE(vio, ibmvnic_device_table); 6684 6685 static const struct dev_pm_ops ibmvnic_pm_ops = { 6686 .resume = ibmvnic_resume 6687 }; 6688 6689 static struct vio_driver ibmvnic_driver = { 6690 .id_table = ibmvnic_device_table, 6691 .probe = ibmvnic_probe, 6692 .remove = ibmvnic_remove, 6693 .get_desired_dma = ibmvnic_get_desired_dma, 6694 .name = ibmvnic_driver_name, 6695 .pm = &ibmvnic_pm_ops, 6696 }; 6697 6698 /* module functions */ 6699 static int __init ibmvnic_module_init(void) 6700 { 6701 int ret; 6702 6703 ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "net/ibmvnic:online", 6704 ibmvnic_cpu_online, 6705 ibmvnic_cpu_down_prep); 6706 if (ret < 0) 6707 goto out; 6708 ibmvnic_online = ret; 6709 ret = cpuhp_setup_state_multi(CPUHP_IBMVNIC_DEAD, "net/ibmvnic:dead", 6710 NULL, ibmvnic_cpu_dead); 6711 if (ret) 6712 goto err_dead; 6713 6714 ret = vio_register_driver(&ibmvnic_driver); 6715 if (ret) 6716 goto err_vio_register; 6717 6718 pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string, 6719 IBMVNIC_DRIVER_VERSION); 6720 6721 return 0; 6722 err_vio_register: 6723 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); 6724 err_dead: 6725 cpuhp_remove_multi_state(ibmvnic_online); 6726 out: 6727 return ret; 6728 } 6729 6730 static void __exit ibmvnic_module_exit(void) 6731 { 6732 vio_unregister_driver(&ibmvnic_driver); 6733 cpuhp_remove_multi_state(CPUHP_IBMVNIC_DEAD); 6734 cpuhp_remove_multi_state(ibmvnic_online); 6735 } 6736 6737 module_init(ibmvnic_module_init); 6738 module_exit(ibmvnic_module_exit); 6739